/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:37:58,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:37:58,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:37:58,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:37:58,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:37:58,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:37:58,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:37:58,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:37:58,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:37:58,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:37:58,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:37:58,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:37:58,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:37:58,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:37:58,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:37:58,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:37:58,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:37:58,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:37:58,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:37:58,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:37:58,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:37:58,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:37:58,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:37:58,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:37:58,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:37:58,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:37:58,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:37:58,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:37:58,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:37:58,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:37:58,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:37:58,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:37:58,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:37:58,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:37:58,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:37:58,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:37:58,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:37:58,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:37:58,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:37:58,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:37:58,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:37:58,922 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 [2020-10-14 05:37:58,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:37:58,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:37:58,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:37:58,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:37:58,953 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:37:58,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:37:58,954 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:37:58,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:37:58,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:37:58,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:37:58,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:37:58,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:37:58,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:37:58,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:37:58,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:37:58,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:37:58,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:37:58,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:37:58,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:37:58,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:37:58,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:37:58,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:37:58,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:37:58,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:37:58,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:37:58,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:37:58,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:37:58,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:37:58,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:37:58,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:37:59,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:37:59,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:37:59,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:37:59,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:37:59,247 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:37:59,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-10-14 05:37:59,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a8e86819/0dacb9f40eca41a78528b8aec4e45dec/FLAG8cf5d8d48 [2020-10-14 05:37:59,743 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:37:59,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-10-14 05:37:59,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a8e86819/0dacb9f40eca41a78528b8aec4e45dec/FLAG8cf5d8d48 [2020-10-14 05:38:00,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a8e86819/0dacb9f40eca41a78528b8aec4e45dec [2020-10-14 05:38:00,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:38:00,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:38:00,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:00,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:38:00,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:38:00,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33dfb059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00, skipping insertion in model container [2020-10-14 05:38:00,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:38:00,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:38:00,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:00,374 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:38:00,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:00,419 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:38:00,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00 WrapperNode [2020-10-14 05:38:00,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:00,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:38:00,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:38:00,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:38:00,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (1/1) ... [2020-10-14 05:38:00,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:38:00,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:38:00,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:38:00,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:38:00,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (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 [2020-10-14 05:38:00,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:38:00,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:38:00,607 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:38:00,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:38:00,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:38:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:38:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:38:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:38:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:38:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:38:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:38:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:38:00,878 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:38:00,878 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 05:38:00,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:00 BoogieIcfgContainer [2020-10-14 05:38:00,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:38:00,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:38:00,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:38:00,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:38:00,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:38:00" (1/3) ... [2020-10-14 05:38:00,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd5cea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:00, skipping insertion in model container [2020-10-14 05:38:00,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:00" (2/3) ... [2020-10-14 05:38:00,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd5cea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:00, skipping insertion in model container [2020-10-14 05:38:00,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:00" (3/3) ... [2020-10-14 05:38:00,894 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-10-14 05:38:00,910 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:38:00,917 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:38:00,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:38:00,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:38:00,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:38:00,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:38:00,960 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:38:00,960 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:38:00,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:38:00,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:38:00,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:38:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 05:38:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:38:00,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:00,991 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] [2020-10-14 05:38:00,991 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-10-14 05:38:01,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:01,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014977148] [2020-10-14 05:38:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:01,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:38:01,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:38:01,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-14 05:38:01,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:01,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:38:01,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:01,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:38:01,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:01,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:01,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:01,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:01,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:38:01,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:01,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:01,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:01,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:01,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:38:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:01,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014977148] [2020-10-14 05:38:01,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:01,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:38:01,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035656267] [2020-10-14 05:38:01,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:38:01,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:38:01,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:38:01,909 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-14 05:38:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:02,045 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2020-10-14 05:38:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:38:02,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-14 05:38:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:02,056 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:38:02,057 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:38:02,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:38:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:38:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:38:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:38:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-14 05:38:02,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2020-10-14 05:38:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:02,105 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-14 05:38:02,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:38:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-14 05:38:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:38:02,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:02,106 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] [2020-10-14 05:38:02,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:38:02,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1282672092, now seen corresponding path program 1 times [2020-10-14 05:38:02,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:02,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693025246] [2020-10-14 05:38:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:02,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:02,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:38:02,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:38:02,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 05:38:02,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:02,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:38:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:38:02,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:38:02,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:02,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:02,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:02,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:38:02,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:02,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:02,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:02,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:02,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:02,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:02,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693025246] [2020-10-14 05:38:02,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:02,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:38:02,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492074653] [2020-10-14 05:38:02,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:38:02,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:38:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:38:02,336 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-14 05:38:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:02,415 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-10-14 05:38:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:38:02,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-14 05:38:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:02,419 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:38:02,419 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:38:02,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:38:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:38:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-10-14 05:38:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 05:38:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 05:38:02,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2020-10-14 05:38:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:02,429 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 05:38:02,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:38:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 05:38:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:38:02,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:02,430 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] [2020-10-14 05:38:02,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:38:02,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:02,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-10-14 05:38:02,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:02,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976601374] [2020-10-14 05:38:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:02,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:38:02,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:38:02,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-14 05:38:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:02,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:38:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 05:38:02,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:38:02,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:02,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:02,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:38:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:38:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:02,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:02,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:38:02,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976601374] [2020-10-14 05:38:02,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:02,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:38:02,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933272518] [2020-10-14 05:38:02,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:38:02,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:02,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:38:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:38:02,862 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-10-14 05:38:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:02,945 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-14 05:38:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:38:02,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:38:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:02,946 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:38:02,946 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:38:02,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:38:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:38:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:38:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:38:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:38:02,947 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-10-14 05:38:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:02,948 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:38:02,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:38:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:38:02,948 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:38:02,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:38:02,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:38:03,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:38:03,035 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-14 05:38:03,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:38:03,035 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:38:03,036 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:38:03,036 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:38:03,036 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:38:03,036 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:38:03,036 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-14 05:38:03,036 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:38:03,036 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:38:03,037 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,037 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-10-14 05:38:03,037 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-10-14 05:38:03,037 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,037 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-10-14 05:38:03,037 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-10-14 05:38:03,038 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-10-14 05:38:03,038 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,038 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-14 05:38:03,038 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-10-14 05:38:03,038 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,038 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-10-14 05:38:03,039 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-10-14 05:38:03,039 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-10-14 05:38:03,039 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-10-14 05:38:03,039 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-10-14 05:38:03,039 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,039 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-10-14 05:38:03,040 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-10-14 05:38:03,040 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (and (<= main_~found~0 1) (<= 0 main_~found~0)) [2020-10-14 05:38:03,040 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-10-14 05:38:03,040 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-10-14 05:38:03,040 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-10-14 05:38:03,040 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-10-14 05:38:03,040 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-14 05:38:03,041 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-10-14 05:38:03,041 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-10-14 05:38:03,041 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-10-14 05:38:03,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:38:03 BoogieIcfgContainer [2020-10-14 05:38:03,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:38:03,062 INFO L168 Benchmark]: Toolchain (without parser) took 2899.89 ms. Allocated memory was 148.4 MB in the beginning and 241.2 MB in the end (delta: 92.8 MB). Free memory was 104.6 MB in the beginning and 175.6 MB in the end (delta: -71.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,063 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.99 ms. Allocated memory is still 148.4 MB. Free memory was 104.6 MB in the beginning and 94.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,065 INFO L168 Benchmark]: Boogie Preprocessor took 122.01 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 94.0 MB in the beginning and 181.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,066 INFO L168 Benchmark]: RCFGBuilder took 340.02 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 161.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,067 INFO L168 Benchmark]: TraceAbstraction took 2174.45 ms. Allocated memory was 203.9 MB in the beginning and 241.2 MB in the end (delta: 37.2 MB). Free memory was 160.9 MB in the beginning and 175.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:03,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.99 ms. Allocated memory is still 148.4 MB. Free memory was 104.6 MB in the beginning and 94.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.01 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 94.0 MB in the beginning and 181.4 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.02 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 161.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2174.45 ms. Allocated memory was 203.9 MB in the beginning and 241.2 MB in the end (delta: 37.2 MB). Free memory was 160.9 MB in the beginning and 175.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: found <= 1 && 0 <= found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 37 SDslu, 84 SDs, 0 SdLazy, 116 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 13 PreInvPairs, 20 NumberOfFragments, 58 HoareAnnotationTreeSize, 13 FomulaSimplifications, 22 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2708 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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 correct! Received shutdown request...