/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:48:01,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:48:01,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:48:01,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:48:01,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:48:01,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:48:01,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:48:01,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:48:01,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:48:01,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:48:01,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:48:01,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:48:01,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:48:01,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:48:01,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:48:01,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:48:02,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:48:02,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:48:02,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:48:02,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:48:02,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:48:02,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:48:02,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:48:02,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:48:02,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:48:02,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:48:02,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:48:02,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:48:02,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:48:02,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:48:02,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:48:02,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:48:02,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:48:02,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:48:02,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:48:02,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:48:02,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:48:02,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:48:02,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:48:02,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:48:02,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:48:02,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:48:02,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:48:02,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:48:02,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:48:02,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:48:02,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:48:02,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:48:02,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:48:02,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:48:02,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:48:02,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:48:02,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:48:02,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:48:02,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:48:02,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:48:02,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:48:02,094 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:48:02,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:48:02,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:48:02,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:48:02,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:48:02,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:48:02,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:48:02,096 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:48:02,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:48:02,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:48:02,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:48:02,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:48:02,591 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:48:02,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2021-02-23 18:48:02,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb56778e/761c4d58fd24436a930764cf65f236cd/FLAG9f495e9c6 [2021-02-23 18:48:03,261 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:48:03,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c [2021-02-23 18:48:03,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb56778e/761c4d58fd24436a930764cf65f236cd/FLAG9f495e9c6 [2021-02-23 18:48:03,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eb56778e/761c4d58fd24436a930764cf65f236cd [2021-02-23 18:48:03,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:48:03,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:48:03,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:03,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:48:03,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:48:03,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a69f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03, skipping insertion in model container [2021-02-23 18:48:03,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:48:03,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:48:03,840 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c[317,330] [2021-02-23 18:48:03,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:03,882 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:48:03,899 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c[317,330] [2021-02-23 18:48:03,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:03,927 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:48:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03 WrapperNode [2021-02-23 18:48:03,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:03,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:48:03,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:48:03,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:48:03,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:03,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (1/1) ... [2021-02-23 18:48:04,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:48:04,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:48:04,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:48:04,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:48:04,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (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 [2021-02-23 18:48:04,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:48:04,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:48:04,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:48:04,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:48:04,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:48:04,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:48:04,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:48:04,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:48:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:48:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:48:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 18:48:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:48:04,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:48:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:48:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:48:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:48:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:48:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:48:04,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:48:04,680 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:48:04,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:04 BoogieIcfgContainer [2021-02-23 18:48:04,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:48:04,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:48:04,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:48:04,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:48:04,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:48:03" (1/3) ... [2021-02-23 18:48:04,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e5630c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:04, skipping insertion in model container [2021-02-23 18:48:04,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:03" (2/3) ... [2021-02-23 18:48:04,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e5630c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:04, skipping insertion in model container [2021-02-23 18:48:04,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:04" (3/3) ... [2021-02-23 18:48:04,712 INFO L111 eAbstractionObserver]: Analyzing ICFG nec11.c [2021-02-23 18:48:04,732 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:48:04,744 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:48:04,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:48:04,802 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:48:04,802 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:48:04,803 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:48:04,803 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:48:04,803 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:48:04,803 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:48:04,803 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:48:04,804 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:48:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-23 18:48:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 18:48:04,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:04,833 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] [2021-02-23 18:48:04,833 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1689601978, now seen corresponding path program 1 times [2021-02-23 18:48:04,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:04,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658499869] [2021-02-23 18:48:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:04,946 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:05,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:05,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:05,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658499869] [2021-02-23 18:48:05,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:05,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:48:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185665656] [2021-02-23 18:48:05,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:48:05,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:48:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:05,228 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-23 18:48:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:05,352 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-23 18:48:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:48:05,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2021-02-23 18:48:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:05,361 INFO L225 Difference]: With dead ends: 49 [2021-02-23 18:48:05,362 INFO L226 Difference]: Without dead ends: 29 [2021-02-23 18:48:05,365 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 [2021-02-23 18:48:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-23 18:48:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-23 18:48:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-23 18:48:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-23 18:48:05,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2021-02-23 18:48:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:05,420 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-23 18:48:05,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:48:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-23 18:48:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 18:48:05,421 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:05,422 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] [2021-02-23 18:48:05,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:48:05,422 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1675749163, now seen corresponding path program 1 times [2021-02-23 18:48:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:05,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085459720] [2021-02-23 18:48:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:05,430 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:05,463 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:05,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:05,535 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:48:05,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:48:05,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:48:05,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:48:05 BoogieIcfgContainer [2021-02-23 18:48:05,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:48:05,563 INFO L168 Benchmark]: Toolchain (without parser) took 1937.62 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 97.0 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:05,568 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:05,570 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:05,571 INFO L168 Benchmark]: Boogie Preprocessor took 70.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:05,572 INFO L168 Benchmark]: RCFGBuilder took 681.53 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 132.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:05,573 INFO L168 Benchmark]: TraceAbstraction took 868.58 ms. Allocated memory is still 151.0 MB. Free memory was 132.1 MB in the beginning and 97.0 MB in the end (delta: 35.0 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:05,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.2 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 681.53 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 132.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 868.58 ms. Allocated memory is still 151.0 MB. Free memory was 132.1 MB in the beginning and 97.0 MB in the end (delta: 35.0 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; [L21] COND FALSE !(\read(c)) [L30] CALL __VERIFIER_assert(len==5) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 21 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...