/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/array-fpi/modsf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:07,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:07,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:07,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:07,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:07,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:07,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:07,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:07,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:07,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:07,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:07,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:07,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:07,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:07,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:07,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:07,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:07,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:07,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:07,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:07,655 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 02:20:07,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:07,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:07,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:07,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:07,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:07,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:07,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:07,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:07,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:07,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:07,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:07,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:07,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:07,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:07,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:07,693 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:07,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:07,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:07,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:07,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:07,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:07,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:07,695 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:07,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:08,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:08,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:08,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:08,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:08,187 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:08,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modsf.c [2021-02-22 02:20:08,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c3b4710/f6dca4cd36e94f2ea26293419ccd85cd/FLAGfe1364ecd [2021-02-22 02:20:08,864 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:08,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modsf.c [2021-02-22 02:20:08,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c3b4710/f6dca4cd36e94f2ea26293419ccd85cd/FLAGfe1364ecd [2021-02-22 02:20:09,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79c3b4710/f6dca4cd36e94f2ea26293419ccd85cd [2021-02-22 02:20:09,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:09,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:09,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:09,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:09,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:09,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47187061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09, skipping insertion in model container [2021-02-22 02:20:09,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:09,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:09,469 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modsf.c[588,601] [2021-02-22 02:20:09,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:09,503 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:09,517 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modsf.c[588,601] [2021-02-22 02:20:09,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:09,548 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:09,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09 WrapperNode [2021-02-22 02:20:09,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:09,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:09,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:09,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:09,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (1/1) ... [2021-02-22 02:20:09,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:09,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:09,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:09,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:09,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (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 02:20:09,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:09,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:09,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:09,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:09,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:09,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:10,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:10,425 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-22 02:20:10,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:10 BoogieIcfgContainer [2021-02-22 02:20:10,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:10,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:10,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:10,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:10,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:09" (1/3) ... [2021-02-22 02:20:10,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4351a418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:10, skipping insertion in model container [2021-02-22 02:20:10,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:09" (2/3) ... [2021-02-22 02:20:10,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4351a418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:10, skipping insertion in model container [2021-02-22 02:20:10,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:10" (3/3) ... [2021-02-22 02:20:10,437 INFO L111 eAbstractionObserver]: Analyzing ICFG modsf.c [2021-02-22 02:20:10,444 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:10,450 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:10,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:10,499 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:10,499 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:10,499 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:10,499 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:10,500 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:10,500 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:10,500 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:10,500 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2021-02-22 02:20:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-22 02:20:10,531 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:10,532 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] [2021-02-22 02:20:10,532 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash 455365332, now seen corresponding path program 1 times [2021-02-22 02:20:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:10,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036939742] [2021-02-22 02:20:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:10,629 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:10,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:10,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:10,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:10,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:10,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:10,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:10,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:10,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:10,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:10,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:10,892 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 02:20:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036939742] [2021-02-22 02:20:10,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:10,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:10,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494595909] [2021-02-22 02:20:10,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:10,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:10,924 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 3 states. [2021-02-22 02:20:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:11,277 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-02-22 02:20:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:11,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-02-22 02:20:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:11,295 INFO L225 Difference]: With dead ends: 151 [2021-02-22 02:20:11,295 INFO L226 Difference]: Without dead ends: 77 [2021-02-22 02:20:11,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 02:20:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-22 02:20:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-02-22 02:20:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-02-22 02:20:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-02-22 02:20:11,401 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 42 [2021-02-22 02:20:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:11,402 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-02-22 02:20:11,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-02-22 02:20:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-22 02:20:11,408 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:11,408 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] [2021-02-22 02:20:11,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:11,409 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2083403351, now seen corresponding path program 1 times [2021-02-22 02:20:11,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:11,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275593439] [2021-02-22 02:20:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:11,432 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:11,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:11,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:11,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:11,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:11,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:11,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:11,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:11,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:11,817 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 02:20:11,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275593439] [2021-02-22 02:20:11,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:11,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52156871] [2021-02-22 02:20:11,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:11,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:11,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:11,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:11,821 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 5 states. [2021-02-22 02:20:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:12,146 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-02-22 02:20:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:12,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-02-22 02:20:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:12,150 INFO L225 Difference]: With dead ends: 155 [2021-02-22 02:20:12,151 INFO L226 Difference]: Without dead ends: 111 [2021-02-22 02:20:12,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-22 02:20:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2021-02-22 02:20:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-22 02:20:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-02-22 02:20:12,173 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 42 [2021-02-22 02:20:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:12,174 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-02-22 02:20:12,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-02-22 02:20:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-22 02:20:12,176 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:12,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:12,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:12,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:12,178 INFO L82 PathProgramCache]: Analyzing trace with hash -556502197, now seen corresponding path program 1 times [2021-02-22 02:20:12,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:12,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864741261] [2021-02-22 02:20:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:12,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:12,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:12,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:12,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:12,237 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:12,250 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:12,256 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:12,259 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:12,260 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:12,289 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:20:12,289 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:12,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:12,314 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:20:12,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:12 BoogieIcfgContainer [2021-02-22 02:20:12,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:12,316 INFO L168 Benchmark]: Toolchain (without parser) took 3051.47 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 95.6 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:12,317 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 124.2 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:12,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.75 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:12,318 INFO L168 Benchmark]: Boogie Preprocessor took 48.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:12,319 INFO L168 Benchmark]: RCFGBuilder took 827.77 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 123.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:12,320 INFO L168 Benchmark]: TraceAbstraction took 1885.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.2 MB in the beginning and 95.6 MB in the end (delta: 27.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:12,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 124.2 MB in the end (delta: 29.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.75 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 827.77 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 123.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1885.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.2 MB in the beginning and 95.6 MB in the end (delta: 27.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] long long *a = malloc(sizeof(long long)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i