/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/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:09,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:09,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:09,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:09,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:09,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:09,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:09,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:09,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:09,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:09,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:09,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:09,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:09,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:09,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:09,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:09,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:09,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:09,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:09,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:09,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:21:09,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:09,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:09,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:09,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:09,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:09,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:09,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:09,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:09,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:09,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:09,339 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:09,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:09,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:09,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:09,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:09,342 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:09,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:09,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:09,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:09,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:09,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:09,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:09,343 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:09,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:09,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:09,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:09,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:09,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:09,818 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:09,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2021-02-22 02:21:09,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4805f823d/7c172c864b74490b9fb45705632122d7/FLAG21fa3b931 [2021-02-22 02:21:10,493 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:10,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2021-02-22 02:21:10,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4805f823d/7c172c864b74490b9fb45705632122d7/FLAG21fa3b931 [2021-02-22 02:21:10,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4805f823d/7c172c864b74490b9fb45705632122d7 [2021-02-22 02:21:10,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:10,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:10,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:10,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:10,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:10,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:10" (1/1) ... [2021-02-22 02:21:10,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451d11f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:10, skipping insertion in model container [2021-02-22 02:21:10,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:10" (1/1) ... [2021-02-22 02:21:10,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:10,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:11,135 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/sum_array-1.c[363,376] [2021-02-22 02:21:11,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:11,166 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:11,180 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/sum_array-1.c[363,376] [2021-02-22 02:21:11,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:11,208 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:11,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11 WrapperNode [2021-02-22 02:21:11,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:11,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:11,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:11,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:11,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (1/1) ... [2021-02-22 02:21:11,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:11,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:11,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:11,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:11,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (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 [2021-02-22 02:21:11,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:11,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:11,398 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:11,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:11,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:11,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:11,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:11,400 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:11,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:21:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:11,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:11,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:11,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:11,964 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-22 02:21:11,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:11 BoogieIcfgContainer [2021-02-22 02:21:11,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:11,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:11,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:11,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:11,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:10" (1/3) ... [2021-02-22 02:21:11,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be43519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:11, skipping insertion in model container [2021-02-22 02:21:11,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:11" (2/3) ... [2021-02-22 02:21:11,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be43519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:11, skipping insertion in model container [2021-02-22 02:21:11,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:11" (3/3) ... [2021-02-22 02:21:11,975 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2021-02-22 02:21:11,982 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:11,988 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:12,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:12,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:12,035 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:12,035 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:12,035 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:12,035 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:12,036 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:12,036 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:12,036 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-02-22 02:21:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-22 02:21:12,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:12,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:12,078 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 748821666, now seen corresponding path program 1 times [2021-02-22 02:21:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:12,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302595545] [2021-02-22 02:21:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:12,174 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:12,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:12,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:12,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:12,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:12,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302595545] [2021-02-22 02:21:12,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:12,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854151930] [2021-02-22 02:21:12,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:12,562 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2021-02-22 02:21:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:12,853 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-02-22 02:21:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:12,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2021-02-22 02:21:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:12,866 INFO L225 Difference]: With dead ends: 119 [2021-02-22 02:21:12,866 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 02:21:12,871 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 [2021-02-22 02:21:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 02:21:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-22 02:21:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-22 02:21:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-02-22 02:21:12,954 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2021-02-22 02:21:12,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:12,955 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-02-22 02:21:12,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-02-22 02:21:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-22 02:21:12,959 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:12,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:12,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:12,960 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash 274707514, now seen corresponding path program 1 times [2021-02-22 02:21:12,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:12,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009128205] [2021-02-22 02:21:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:12,975 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:13,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:13,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-22 02:21:13,216 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-22 02:21:13,217 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-22 02:21:13,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:13,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009128205] [2021-02-22 02:21:13,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:13,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:21:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816180228] [2021-02-22 02:21:13,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:21:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:21:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:21:13,298 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 6 states. [2021-02-22 02:21:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:13,574 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-02-22 02:21:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 02:21:13,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-02-22 02:21:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:13,577 INFO L225 Difference]: With dead ends: 133 [2021-02-22 02:21:13,578 INFO L226 Difference]: Without dead ends: 92 [2021-02-22 02:21:13,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:21:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-22 02:21:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-02-22 02:21:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-22 02:21:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-02-22 02:21:13,596 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 33 [2021-02-22 02:21:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:13,597 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-02-22 02:21:13,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:21:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-02-22 02:21:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-22 02:21:13,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:13,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-02-22 02:21:13,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:13,599 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:13,600 INFO L82 PathProgramCache]: Analyzing trace with hash 427652598, now seen corresponding path program 1 times [2021-02-22 02:21:13,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:13,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694728553] [2021-02-22 02:21:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:25,762 WARN L202 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2021-02-22 02:21:25,772 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-22 02:21:25,780 INFO L168 Benchmark]: Toolchain (without parser) took 14893.90 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 128.2 MB in the beginning and 110.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 80.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:25,781 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:25,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:25,787 INFO L168 Benchmark]: Boogie Preprocessor took 45.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:25,790 INFO L168 Benchmark]: RCFGBuilder took 709.60 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 126.0 MB in the end (delta: -10.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:25,795 INFO L168 Benchmark]: TraceAbstraction took 13809.47 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 126.0 MB in the beginning and 110.1 MB in the end (delta: 15.9 MB). Peak memory consumption was 78.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:25,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 709.60 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 126.0 MB in the end (delta: -10.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13809.47 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 126.0 MB in the beginning and 110.1 MB in the end (delta: 15.9 MB). Peak memory consumption was 78.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...