/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark02_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:34:32,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:34:32,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:34:32,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:34:32,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:34:32,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:34:32,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:34:32,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:34:32,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:34:32,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:34:32,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:34:32,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:34:32,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:34:32,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:34:32,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:34:32,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:34:32,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:34:32,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:34:32,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:34:32,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:34:32,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:34:32,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:34:32,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:34:32,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:34:32,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 13:34:32,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 13:34:32,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 13:34:32,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 13:34:32,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 13:34:32,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 13:34:32,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 13:34:32,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 13:34:32,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 13:34:32,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 13:34:32,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 13:34:32,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 13:34:32,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 13:34:32,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 13:34:32,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:34:32,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:34:32,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:34:32,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:34:32,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:34:32,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:34:32,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:34:32,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:34:32,991 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:34:32,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:34:32,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:34:32,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:34:32,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:34:32,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:34:32,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:34:32,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:34:32,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:34:32,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:34:32,995 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:34:33,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:34:33,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:34:33,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:34:33,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:34:33,319 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:34:33,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark02_linear.i [2021-05-02 13:34:33,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f3cfd03/6c23c72b84a04d4b9e9f0bbcdd346ce1/FLAG0146aec36 [2021-05-02 13:34:33,767 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:34:33,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark02_linear.i [2021-05-02 13:34:33,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f3cfd03/6c23c72b84a04d4b9e9f0bbcdd346ce1/FLAG0146aec36 [2021-05-02 13:34:33,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f3cfd03/6c23c72b84a04d4b9e9f0bbcdd346ce1 [2021-05-02 13:34:33,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:34:33,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:34:33,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:34:33,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:34:33,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:34:33,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:33,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5663def5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33, skipping insertion in model container [2021-05-02 13:34:33,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:33,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:34:33,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:34:33,898 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark02_linear.i[868,881] [2021-05-02 13:34:33,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:34:33,915 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:34:33,923 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark02_linear.i[868,881] [2021-05-02 13:34:33,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:34:33,967 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:34:33,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33 WrapperNode [2021-05-02 13:34:33,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:34:33,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:34:33,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:34:33,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:34:33,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:33,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:33,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:33,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:34,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:34,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:34,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... [2021-05-02 13:34:34,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:34:34,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:34:34,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:34:34,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:34:34,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-05-02 13:34:34,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:34:34,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:34:34,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:34:34,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:34:34,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:34:34,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:34:34,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 13:34:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:34:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:34:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:34:34,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:34:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:34:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:34:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:34:34,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:34:34,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:34:34,368 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:34:34,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:34:34 BoogieIcfgContainer [2021-05-02 13:34:34,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:34:34,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:34:34,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:34:34,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:34:34,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:34:33" (1/3) ... [2021-05-02 13:34:34,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a6dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:34:34, skipping insertion in model container [2021-05-02 13:34:34,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:34:33" (2/3) ... [2021-05-02 13:34:34,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a6dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:34:34, skipping insertion in model container [2021-05-02 13:34:34,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:34:34" (3/3) ... [2021-05-02 13:34:34,382 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark02_linear.i [2021-05-02 13:34:34,386 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:34:34,389 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:34:34,411 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:34:34,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:34:34,447 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:34:34,447 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:34:34,447 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:34:34,447 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:34:34,447 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:34:34,447 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:34:34,447 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:34:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:34:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:34:34,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:34:34,468 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:34:34,468 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:34:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:34:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-02 13:34:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:34:34,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75588615] [2021-05-02 13:34:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:34:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:34:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:34:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:34:34,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:34:34,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75588615] [2021-05-02 13:34:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75588615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:34:34,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:34:34,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:34:34,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274631195] [2021-05-02 13:34:34,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:34:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:34:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:34:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:34:34,712 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:34:34,903 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 13:34:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:34:34,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:34:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:34:34,908 INFO L225 Difference]: With dead ends: 32 [2021-05-02 13:34:34,908 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:34:34,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:34:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:34:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:34:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:34:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:34:34,957 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-02 13:34:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:34:34,957 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:34:34,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:34:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:34:34,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:34:34,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:34:34,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:34:35,068 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L198 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L194 CegarLoopUtils]: 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)|)) [2021-05-02 13:34:35,069 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:34:35,069 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:34:35,070 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 30) the Hoare annotation is: true [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 30) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point L24(line 24) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L194 CegarLoopUtils]: At program point L25-2(lines 25 27) the Hoare annotation is: (< 0 main_~l~0) [2021-05-02 13:34:35,070 INFO L194 CegarLoopUtils]: At program point L25-3(lines 25 27) the Hoare annotation is: (< 0 main_~l~0) [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 30) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L198 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-05-02 13:34:35,070 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2021-05-02 13:34:35,071 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:34:35,071 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2021-05-02 13:34:35,071 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:34:35,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:34:35 BoogieIcfgContainer [2021-05-02 13:34:35,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:34:35,099 INFO L168 Benchmark]: Toolchain (without parser) took 1306.14 ms. Allocated memory was 167.8 MB in the beginning and 211.8 MB in the end (delta: 44.0 MB). Free memory was 131.4 MB in the beginning and 190.9 MB in the end (delta: -59.4 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:34:35,099 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 167.8 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:34:35,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.66 ms. Allocated memory is still 167.8 MB. Free memory was 131.3 MB in the beginning and 149.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:34:35,100 INFO L168 Benchmark]: Boogie Preprocessor took 50.86 ms. Allocated memory is still 167.8 MB. Free memory was 149.9 MB in the beginning and 150.5 MB in the end (delta: -553.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:34:35,101 INFO L168 Benchmark]: RCFGBuilder took 348.80 ms. Allocated memory is still 167.8 MB. Free memory was 150.5 MB in the beginning and 136.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:34:35,101 INFO L168 Benchmark]: TraceAbstraction took 727.15 ms. Allocated memory was 167.8 MB in the beginning and 211.8 MB in the end (delta: 44.0 MB). Free memory was 136.4 MB in the beginning and 190.9 MB in the end (delta: -54.5 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:34:35,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 167.8 MB. Free memory is still 147.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.66 ms. Allocated memory is still 167.8 MB. Free memory was 131.3 MB in the beginning and 149.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.86 ms. Allocated memory is still 167.8 MB. Free memory was 149.9 MB in the beginning and 150.5 MB in the end (delta: -553.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 348.80 ms. Allocated memory is still 167.8 MB. Free memory was 150.5 MB in the beginning and 136.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 727.15 ms. Allocated memory was 167.8 MB in the beginning and 211.8 MB in the end (delta: 44.0 MB). Free memory was 136.4 MB in the beginning and 190.9 MB in the end (delta: -54.5 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 513.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.8ms, AutomataDifference: 207.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 109.8ms, InitialAbstractionConstructionTime: 12.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 18 SDslu, 26 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 35 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 35.7ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 106 FormulaSimplificationTreeSizeReductionInter, 68.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 11.2ms SsaConstructionTime, 38.4ms SatisfiabilityAnalysisTime, 119.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 45 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 0 < l RESULT: Ultimate proved your program to be correct! Received shutdown request...