/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 05:29:54,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:29:54,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:29:55,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:29:55,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:29:55,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:29:55,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:29:55,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:29:55,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:29:55,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:29:55,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:29:55,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:29:55,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:29:55,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:29:55,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:29:55,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:29:55,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:29:55,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:29:55,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:29:55,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:29:55,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:29:55,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:29:55,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:29:55,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:29:55,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:29:55,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:29:55,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:29:55,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:29:55,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:29:55,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:29:55,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:29:55,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:29:55,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:29:55,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:29:55,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:29:55,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:29:55,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:29:55,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:29:55,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:29:55,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:29:55,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:29:55,111 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 05:29:55,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:29:55,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:29:55,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:29:55,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:29:55,160 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:29:55,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:29:55,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:29:55,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:29:55,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:29:55,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:29:55,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:29:55,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:29:55,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:29:55,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:29:55,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:29:55,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:29:55,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:29:55,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:29:55,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:29:55,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:29:55,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:29:55,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:29:55,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:29:55,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:29:55,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:29:55,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:29:55,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:29:55,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:29:55,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:29:55,167 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:29:55,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:29:55,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:29:55,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:29:55,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:29:55,680 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:29:55,681 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 05:29:55,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccc44314/3ef4b0d749f94695874df97dbf0f0ea4/FLAG751fe8073 [2020-09-25 05:29:56,348 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:29:56,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 05:29:56,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccc44314/3ef4b0d749f94695874df97dbf0f0ea4/FLAG751fe8073 [2020-09-25 05:29:56,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ccc44314/3ef4b0d749f94695874df97dbf0f0ea4 [2020-09-25 05:29:56,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:29:56,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:29:56,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:29:56,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:29:56,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:29:56,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:29:56" (1/1) ... [2020-09-25 05:29:56,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b01e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:56, skipping insertion in model container [2020-09-25 05:29:56,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:29:56" (1/1) ... [2020-09-25 05:29:56,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:29:56,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:29:56,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:29:56,988 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:29:57,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:29:57,043 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:29:57,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57 WrapperNode [2020-09-25 05:29:57,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:29:57,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:29:57,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:29:57,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:29:57,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (1/1) ... [2020-09-25 05:29:57,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:29:57,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:29:57,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:29:57,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:29:57,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (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 05:29:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:29:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:29:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:29:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-25 05:29:57,365 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-25 05:29:57,366 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 05:29:57,366 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-25 05:29:57,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:29:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 05:29:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 05:29:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:29:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:29:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:29:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:29:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-25 05:29:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 05:29:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 05:29:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 05:29:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-25 05:29:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 05:29:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:29:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 05:29:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-25 05:29:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:29:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:29:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:29:57,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 05:29:57,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:29:57,729 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:29:57,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:29:57 BoogieIcfgContainer [2020-09-25 05:29:57,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:29:57,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:29:57,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:29:57,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:29:57,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:29:56" (1/3) ... [2020-09-25 05:29:57,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2922a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:29:57, skipping insertion in model container [2020-09-25 05:29:57,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:29:57" (2/3) ... [2020-09-25 05:29:57,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2922a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:29:57, skipping insertion in model container [2020-09-25 05:29:57,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:29:57" (3/3) ... [2020-09-25 05:29:57,747 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-25 05:29:57,776 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:29:57,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:29:57,841 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:29:57,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:29:57,874 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:29:57,874 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:29:57,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:29:57,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:29:57,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:29:57,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:29:57,875 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:29:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-25 05:29:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:29:57,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:29:57,911 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 05:29:57,911 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:29:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:29:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-25 05:29:57,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:29:57,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520319748] [2020-09-25 05:29:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:29:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:29:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:58,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:59,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:29:59,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 05:29:59,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:29:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-09-25 05:29:59,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:29:59,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:29:59,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:29:59,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:29:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 05:29:59,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:29:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:29:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:29:59,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:59,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:29:59,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:29:59,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:29:59,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:29:59,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:29:59,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:29:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:29:59,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:29:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:29:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:29:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 05:29:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:29:59,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:59,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:29:59,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:29:59,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:29:59,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 05:29:59,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:29:59,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:29:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:29:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:29:59,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:29:59,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:29:59,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 05:29:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:29:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:29:59,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:29:59,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:29:59,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:29:59,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 05:29:59,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:29:59,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:29:59,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:29:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:29:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:29:59,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:29:59,583 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 05:29:59,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520319748] [2020-09-25 05:29:59,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:29:59,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 05:29:59,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016667306] [2020-09-25 05:29:59,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 05:29:59,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:29:59,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 05:29:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 05:29:59,616 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 10 states. [2020-09-25 05:30:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:30:00,498 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-09-25 05:30:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 05:30:00,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-09-25 05:30:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:30:00,516 INFO L225 Difference]: With dead ends: 134 [2020-09-25 05:30:00,516 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 05:30:00,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-25 05:30:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 05:30:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-25 05:30:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 05:30:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-09-25 05:30:00,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-09-25 05:30:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:30:00,592 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-09-25 05:30:00,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 05:30:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-09-25 05:30:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 05:30:00,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:30:00,597 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:30:00,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:30:00,598 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:30:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:30:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1181568947, now seen corresponding path program 1 times [2020-09-25 05:30:00,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:30:00,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397409637] [2020-09-25 05:30:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:30:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:01,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:01,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 05:30:01,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:30:01,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1313 [2020-09-25 05:30:01,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:01,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:30:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 05:30:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:30:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:30:02,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:30:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:02,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:02,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:30:02,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:30:02,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 05:30:02,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:02,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:02,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:30:02,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:30:02,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:30:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:30:02,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 05:30:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:02,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:02,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:02,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 05:30:02,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:30:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-25 05:30:02,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:02,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:02,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:30:02,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:30:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:30:02,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:30:02,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 05:30:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:02,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:02,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:30:02,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:30:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:30:02,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:02,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:30:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:30:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:30:02,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 05:30:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:02,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:02,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:02,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:30:02,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:30:02,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 05:30:02,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:02,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:02,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:30:02,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:30:02,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:30:02,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:30:02,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 05:30:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:30:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:30:02,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:30:02,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:30:02,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:30:02,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 05:30:02,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:30:02,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:30:02,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:30:02,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:30:02,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:30:02,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:30:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 05:30:02,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397409637] [2020-09-25 05:30:02,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:30:02,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 05:30:02,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606491046] [2020-09-25 05:30:02,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:30:02,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:30:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:30:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:30:02,284 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 9 states. [2020-09-25 05:30:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:30:03,079 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-09-25 05:30:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:30:03,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-09-25 05:30:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:30:03,083 INFO L225 Difference]: With dead ends: 102 [2020-09-25 05:30:03,084 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 05:30:03,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:30:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 05:30:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 05:30:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 05:30:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-25 05:30:03,101 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 54 [2020-09-25 05:30:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:30:03,102 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-25 05:30:03,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:30:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-25 05:30:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 05:30:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:30:03,106 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 05:30:03,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:30:03,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:30:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:30:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-25 05:30:03,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:30:03,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708336885] [2020-09-25 05:30:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:30:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:30:03,148 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:30:03,149 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:30:03,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:30:03,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:30:03 BoogieIcfgContainer [2020-09-25 05:30:03,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:30:03,189 INFO L168 Benchmark]: Toolchain (without parser) took 6509.69 ms. Allocated memory was 138.9 MB in the beginning and 286.8 MB in the end (delta: 147.8 MB). Free memory was 102.1 MB in the beginning and 249.6 MB in the end (delta: -147.5 MB). Peak memory consumption was 374.4 kB. Max. memory is 7.1 GB. [2020-09-25 05:30:03,189 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:30:03,190 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.93 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:30:03,192 INFO L168 Benchmark]: Boogie Preprocessor took 203.41 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 180.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:30:03,193 INFO L168 Benchmark]: RCFGBuilder took 486.69 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:30:03,194 INFO L168 Benchmark]: TraceAbstraction took 5447.89 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 157.0 MB in the beginning and 249.6 MB in the end (delta: -92.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:30:03,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.93 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 203.41 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 180.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.69 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5447.89 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 157.0 MB in the beginning and 249.6 MB in the end (delta: -92.6 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: 5.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 262 SDslu, 328 SDs, 0 SdLazy, 737 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 15915 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 11/11 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...