/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:18:34,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:18:34,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:18:34,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:18:34,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:18:34,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:18:34,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:18:34,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:18:34,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:18:34,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:18:34,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:18:34,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:18:34,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:18:34,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:18:34,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:18:34,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:18:34,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:18:34,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:18:34,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:18:34,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:18:34,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:18:34,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:18:34,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:18:34,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:18:34,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:18:34,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:18:34,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:18:34,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:18:34,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:18:34,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:18:34,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:18:34,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:18:34,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:18:34,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:18:34,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:18:34,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:18:34,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:18:34,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:18:34,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:18:34,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:18:34,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:18:34,966 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 [2020-10-28 15:18:34,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:18:34,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:18:34,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:18:34,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:18:34,998 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:18:34,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:18:35,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:18:35,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:18:35,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:18:35,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:18:35,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:18:35,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:18:35,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:18:35,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:18:35,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:18:35,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:18:35,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:18:35,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:18:35,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:18:35,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:18:35,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:18:35,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:18:35,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:18:35,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:18:35,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:18:35,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:18:35,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:18:35,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:18:35,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:18:35,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:18:35,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:18:35,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:18:35,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:18:35,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:18:35,498 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:18:35,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-10-28 15:18:35,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b19057e/99842d0b19c14a98b1c49443d69b3c23/FLAGf35523085 [2020-10-28 15:18:36,353 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:18:36,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-10-28 15:18:36,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b19057e/99842d0b19c14a98b1c49443d69b3c23/FLAGf35523085 [2020-10-28 15:18:36,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17b19057e/99842d0b19c14a98b1c49443d69b3c23 [2020-10-28 15:18:36,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:18:36,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:18:36,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:36,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:18:36,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:18:36,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:36" (1/1) ... [2020-10-28 15:18:36,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571e44c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:36, skipping insertion in model container [2020-10-28 15:18:36,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:36" (1/1) ... [2020-10-28 15:18:36,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:18:36,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:18:36,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:36,956 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:18:36,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:37,001 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:18:37,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37 WrapperNode [2020-10-28 15:18:37,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:37,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:18:37,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:18:37,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:18:37,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (1/1) ... [2020-10-28 15:18:37,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:18:37,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:18:37,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:18:37,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:18:37,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (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 [2020-10-28 15:18:37,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:18:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:18:37,133 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:18:37,134 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:18:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:18:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:18:37,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:18:37,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:18:37,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:18:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:18:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:18:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:18:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:18:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:18:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 15:18:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:18:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:18:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:18:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:18:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:18:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:18:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:18:37,799 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:18:37,800 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 15:18:37,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:37 BoogieIcfgContainer [2020-10-28 15:18:37,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:18:37,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:18:37,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:18:37,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:18:37,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:18:36" (1/3) ... [2020-10-28 15:18:37,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61df13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:37, skipping insertion in model container [2020-10-28 15:18:37,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:37" (2/3) ... [2020-10-28 15:18:37,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61df13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:37, skipping insertion in model container [2020-10-28 15:18:37,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:37" (3/3) ... [2020-10-28 15:18:37,817 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-10-28 15:18:37,830 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:18:37,836 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:18:37,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:18:37,899 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:18:37,900 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:18:37,900 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:18:37,900 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:18:37,900 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:18:37,900 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:18:37,901 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:18:37,901 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:18:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 15:18:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:18:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:37,938 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] [2020-10-28 15:18:37,939 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1881354354, now seen corresponding path program 1 times [2020-10-28 15:18:37,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:37,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766861627] [2020-10-28 15:18:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:38,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:38,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:38,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:39,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:39,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:18:39,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:18:39,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-28 15:18:39,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:39,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:39,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:18:39,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:39,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:18:39,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:39,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:39,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:39,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:39,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:18:39,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:39,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:39,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:39,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766861627] [2020-10-28 15:18:39,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:39,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:18:39,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954128718] [2020-10-28 15:18:39,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:18:39,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:18:39,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:18:39,345 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 15:18:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:39,511 INFO L93 Difference]: Finished difference Result 69 states and 99 transitions. [2020-10-28 15:18:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:18:39,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-28 15:18:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:39,522 INFO L225 Difference]: With dead ends: 69 [2020-10-28 15:18:39,522 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:18:39,526 INFO L677 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 [2020-10-28 15:18:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:18:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 15:18:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:18:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-28 15:18:39,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2020-10-28 15:18:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:39,572 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-28 15:18:39,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:18:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-28 15:18:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:18:39,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:39,574 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] [2020-10-28 15:18:39,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:18:39,575 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1024336198, now seen corresponding path program 1 times [2020-10-28 15:18:39,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:39,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659671463] [2020-10-28 15:18:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:40,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:18:40,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:18:40,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-28 15:18:40,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:40,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:40,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:18:40,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:40,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:18:40,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:18:40,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:40,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:40,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:40,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659671463] [2020-10-28 15:18:40,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:18:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5933197] [2020-10-28 15:18:40,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:18:40,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:18:40,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:18:40,150 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-10-28 15:18:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:40,284 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-28 15:18:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:18:40,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-28 15:18:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:40,287 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:18:40,288 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:18:40,289 INFO L677 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 [2020-10-28 15:18:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:18:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-28 15:18:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:18:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 15:18:40,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2020-10-28 15:18:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:40,299 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 15:18:40,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:18:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 15:18:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:18:40,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:40,301 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] [2020-10-28 15:18:40,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:18:40,302 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -607743226, now seen corresponding path program 1 times [2020-10-28 15:18:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:40,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160888545] [2020-10-28 15:18:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:40,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:41,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:41,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:18:41,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:18:41,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-28 15:18:41,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:41,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:41,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:18:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 15:18:41,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:18:41,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:41,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:41,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:41,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:41,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:41,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:18:41,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:41,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:18:41,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160888545] [2020-10-28 15:18:41,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:41,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:18:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406594246] [2020-10-28 15:18:41,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:18:41,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:18:41,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:18:41,157 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-28 15:18:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:41,296 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-28 15:18:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:18:41,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 15:18:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:41,297 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:18:41,297 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:18:41,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:18:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:18:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:18:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:18:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:18:41,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-10-28 15:18:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:41,299 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:18:41,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:18:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:18:41,299 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:18:41,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:18:41,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:18:41,409 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 15:18:41,410 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 15:18:41,410 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:18:41,410 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 15:18:41,410 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 15:18:41,410 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:18:41,411 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 15:18:41,411 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:18:41,411 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:18:41,411 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:18:41,411 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:18:41,411 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:18:41,411 INFO L274 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 15 17) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 28 72) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L270 CegarLoopResult]: At program point L69(line 69) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point L69-1(line 69) no Hoare annotation was computed. [2020-10-28 15:18:41,412 INFO L274 CegarLoopResult]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2020-10-28 15:18:41,413 INFO L274 CegarLoopResult]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2020-10-28 15:18:41,413 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 38) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,413 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2020-10-28 15:18:41,413 INFO L274 CegarLoopResult]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2020-10-28 15:18:41,413 INFO L270 CegarLoopResult]: At program point L33-3(lines 33 34) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,413 INFO L274 CegarLoopResult]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2020-10-28 15:18:41,413 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2020-10-28 15:18:41,414 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 28 72) no Hoare annotation was computed. [2020-10-28 15:18:41,414 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 47) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,414 INFO L274 CegarLoopResult]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2020-10-28 15:18:41,414 INFO L274 CegarLoopResult]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2020-10-28 15:18:41,414 INFO L270 CegarLoopResult]: At program point L42-3(lines 42 43) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,414 INFO L274 CegarLoopResult]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2020-10-28 15:18:41,414 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 28 72) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-28 15:18:41,415 INFO L274 CegarLoopResult]: For program point L55(lines 55 64) no Hoare annotation was computed. [2020-10-28 15:18:41,415 INFO L270 CegarLoopResult]: At program point L55-2(lines 53 65) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-10-28 15:18:41,415 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-28 15:18:41,415 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-10-28 15:18:41,415 INFO L274 CegarLoopResult]: For program point L19-2(lines 18 23) no Hoare annotation was computed. [2020-10-28 15:18:41,415 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 18 23) the Hoare annotation is: true [2020-10-28 15:18:41,415 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 18 23) no Hoare annotation was computed. [2020-10-28 15:18:41,416 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:18:41,416 INFO L274 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-10-28 15:18:41,416 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-28 15:18:41,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:18:41 BoogieIcfgContainer [2020-10-28 15:18:41,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:18:41,454 INFO L168 Benchmark]: Toolchain (without parser) took 4734.93 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 131.6 MB in the beginning and 110.4 MB in the end (delta: 21.2 MB). Peak memory consumption was 53.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:41,455 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:18:41,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.28 ms. Allocated memory is still 156.2 MB. Free memory was 131.1 MB in the beginning and 121.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:41,457 INFO L168 Benchmark]: Boogie Preprocessor took 45.90 ms. Allocated memory is still 156.2 MB. Free memory was 120.8 MB in the beginning and 119.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:41,460 INFO L168 Benchmark]: RCFGBuilder took 753.94 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 99.6 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:41,461 INFO L168 Benchmark]: TraceAbstraction took 3641.81 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 99.1 MB in the beginning and 110.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:41,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.28 ms. Allocated memory is still 156.2 MB. Free memory was 131.1 MB in the beginning and 121.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.90 ms. Allocated memory is still 156.2 MB. Free memory was 120.8 MB in the beginning and 119.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 753.94 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 99.6 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3641.81 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 99.1 MB in the beginning and 110.4 MB in the end (delta: -11.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 46]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 39 SDslu, 85 SDs, 0 SdLazy, 117 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 13 LocationsWithAnnotation, 19 PreInvPairs, 26 NumberOfFragments, 81 HoareAnnotationTreeSize, 19 FomulaSimplifications, 22 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 50 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 4241 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...