/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:20,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:20,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:20,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:47:20,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:20,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:20,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:20,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:20,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:20,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:20,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:20,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:20,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:21,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:21,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:21,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:21,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:21,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:21,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:21,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:21,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:21,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:21,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:21,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:21,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:21,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:21,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:21,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:21,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:21,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:21,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:21,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:21,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:21,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:21,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:21,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:21,055 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:21,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:21,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:21,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:21,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:21,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:21,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:21,057 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:21,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:21,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:21,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:21,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:21,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:21,483 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:21,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-02-24 04:47:21,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d4a93a/5f97ce7f99284b938dfaeb4dbc357416/FLAG2b88dcb95 [2021-02-24 04:47:22,130 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:22,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2021-02-24 04:47:22,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d4a93a/5f97ce7f99284b938dfaeb4dbc357416/FLAG2b88dcb95 [2021-02-24 04:47:22,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d4a93a/5f97ce7f99284b938dfaeb4dbc357416 [2021-02-24 04:47:22,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:22,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:22,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:22,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:22,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:22,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a817119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22, skipping insertion in model container [2021-02-24 04:47:22,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:22,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:22,700 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-02-24 04:47:22,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:22,721 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:22,735 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-02-24 04:47:22,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:22,754 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:22,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22 WrapperNode [2021-02-24 04:47:22,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:22,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:22,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:22,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:22,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (1/1) ... [2021-02-24 04:47:22,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:22,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:22,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:22,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:22,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (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 [2021-02-24 04:47:22,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:22,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:22,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:22,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:22,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:22,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:22,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:23,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:23,279 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:47:23,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:23 BoogieIcfgContainer [2021-02-24 04:47:23,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:23,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:23,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:23,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:23,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:22" (1/3) ... [2021-02-24 04:47:23,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e83473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:23, skipping insertion in model container [2021-02-24 04:47:23,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:22" (2/3) ... [2021-02-24 04:47:23,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e83473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:23, skipping insertion in model container [2021-02-24 04:47:23,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:23" (3/3) ... [2021-02-24 04:47:23,312 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-02-24 04:47:23,328 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:23,333 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:23,373 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:23,419 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:23,419 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:23,419 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:23,419 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:23,419 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:23,420 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:23,420 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:23,420 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-02-24 04:47:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 04:47:23,467 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:23,468 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] [2021-02-24 04:47:23,468 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:23,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash -143449552, now seen corresponding path program 1 times [2021-02-24 04:47:23,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:23,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481512134] [2021-02-24 04:47:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:23,581 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:23,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:23,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:23,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:23,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:23,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:23,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:23,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481512134] [2021-02-24 04:47:23,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:47:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354736722] [2021-02-24 04:47:23,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:47:23,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:47:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:23,904 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-02-24 04:47:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:24,013 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-02-24 04:47:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:47:24,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 04:47:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:24,025 INFO L225 Difference]: With dead ends: 46 [2021-02-24 04:47:24,025 INFO L226 Difference]: Without dead ends: 28 [2021-02-24 04:47:24,028 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 [2021-02-24 04:47:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-24 04:47:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-24 04:47:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-24 04:47:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-02-24 04:47:24,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-02-24 04:47:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:24,081 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-02-24 04:47:24,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:47:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-02-24 04:47:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 04:47:24,083 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:24,083 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] [2021-02-24 04:47:24,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:24,083 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -157302367, now seen corresponding path program 1 times [2021-02-24 04:47:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026978995] [2021-02-24 04:47:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:24,088 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:24,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:47:24,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:24,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:24,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:24,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:24,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026978995] [2021-02-24 04:47:24,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:24,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:47:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187202629] [2021-02-24 04:47:24,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:47:24,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:47:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:47:24,388 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 6 states. [2021-02-24 04:47:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:24,840 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-02-24 04:47:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:47:24,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-24 04:47:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:24,842 INFO L225 Difference]: With dead ends: 35 [2021-02-24 04:47:24,842 INFO L226 Difference]: Without dead ends: 30 [2021-02-24 04:47:24,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:47:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-24 04:47:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-02-24 04:47:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-24 04:47:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-24 04:47:24,855 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2021-02-24 04:47:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:24,856 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-24 04:47:24,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:47:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-24 04:47:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 04:47:24,857 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:24,857 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] [2021-02-24 04:47:24,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:47:24,858 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1837920541, now seen corresponding path program 1 times [2021-02-24 04:47:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:24,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050083240] [2021-02-24 04:47:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:24,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:47:24,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:47:24,922 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-24 04:47:24,939 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-24 04:47:24,944 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:24,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:47:24,957 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-24 04:47:24,965 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.9 percent of original size [2021-02-24 04:47:24,976 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.9 percent of original size 45 [2021-02-24 04:47:24,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:47:24,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:24,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 04:47:25,005 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-24 04:47:25,007 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-24 04:47:25,013 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:25,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:25,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:47:25,024 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-24 04:47:25,033 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.3 percent of original size [2021-02-24 04:47:25,038 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.3 percent of original size 43 [2021-02-24 04:47:25,040 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:47:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:25,114 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:25,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:25,180 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:47:25,180 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:47:25,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:47:25,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:47:25 BoogieIcfgContainer [2021-02-24 04:47:25,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:47:25,197 INFO L168 Benchmark]: Toolchain (without parser) took 2694.42 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 115.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:25,197 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:25,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:25,199 INFO L168 Benchmark]: Boogie Preprocessor took 38.44 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:25,200 INFO L168 Benchmark]: RCFGBuilder took 497.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:25,201 INFO L168 Benchmark]: TraceAbstraction took 1899.12 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 115.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:25,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.44 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 497.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1899.12 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 115.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 42 SDslu, 42 SDs, 0 SdLazy, 68 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...