/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/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:16,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:16,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:16,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:16,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:16,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:16,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:16,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:16,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:16,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:16,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:16,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:16,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:16,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:16,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:16,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:16,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:16,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:16,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:16,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:16,736 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 02:20:16,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:16,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:16,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:16,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:16,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:16,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:16,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:16,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:16,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:16,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:16,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:16,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:16,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:16,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:16,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:16,753 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:16,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:16,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:16,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:16,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:16,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:16,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:16,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:16,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:17,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:17,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:17,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:17,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:17,168 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:17,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2021-02-22 02:20:17,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e2bf7d7/5b630c7c2665413091bf94a3d278d858/FLAGa31dffa07 [2021-02-22 02:20:17,890 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:17,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2021-02-22 02:20:17,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e2bf7d7/5b630c7c2665413091bf94a3d278d858/FLAGa31dffa07 [2021-02-22 02:20:18,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e2bf7d7/5b630c7c2665413091bf94a3d278d858 [2021-02-22 02:20:18,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:18,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:18,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:18,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:18,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:18,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41916977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18, skipping insertion in model container [2021-02-22 02:20:18,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:18,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:18,418 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/res2of.c[589,602] [2021-02-22 02:20:18,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:18,452 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:18,467 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/res2of.c[589,602] [2021-02-22 02:20:18,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:18,499 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:18,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18 WrapperNode [2021-02-22 02:20:18,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:18,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:18,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:18,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:18,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (1/1) ... [2021-02-22 02:20:18,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:18,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:18,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:18,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:18,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (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 02:20:18,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:18,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:18,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:18,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:18,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:18,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:18,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:18,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:18,763 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:18,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:18,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:18,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:18,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:18,764 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:20:18,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:18,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:20:18,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:18,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:18,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:19,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:19,473 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-22 02:20:19,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:19 BoogieIcfgContainer [2021-02-22 02:20:19,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:19,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:19,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:19,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:19,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:18" (1/3) ... [2021-02-22 02:20:19,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dab40bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:19, skipping insertion in model container [2021-02-22 02:20:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:18" (2/3) ... [2021-02-22 02:20:19,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dab40bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:19, skipping insertion in model container [2021-02-22 02:20:19,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:19" (3/3) ... [2021-02-22 02:20:19,485 INFO L111 eAbstractionObserver]: Analyzing ICFG res2of.c [2021-02-22 02:20:19,492 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:19,498 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:19,518 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:19,546 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:19,546 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:19,547 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:19,547 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:19,547 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:19,547 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:19,547 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:19,548 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2021-02-22 02:20:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-22 02:20:19,578 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:19,579 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] [2021-02-22 02:20:19,580 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:19,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1942755798, now seen corresponding path program 1 times [2021-02-22 02:20:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:19,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406325018] [2021-02-22 02:20:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:19,682 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:19,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:19,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:19,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:19,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:19,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:19,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:19,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:19,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:19,945 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 02:20:19,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406325018] [2021-02-22 02:20:19,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:19,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:19,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751752414] [2021-02-22 02:20:19,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:19,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:19,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:19,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:19,981 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2021-02-22 02:20:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:20,337 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2021-02-22 02:20:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:20,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2021-02-22 02:20:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:20,351 INFO L225 Difference]: With dead ends: 173 [2021-02-22 02:20:20,351 INFO L226 Difference]: Without dead ends: 85 [2021-02-22 02:20:20,362 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 02:20:20,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-22 02:20:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-02-22 02:20:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-22 02:20:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-02-22 02:20:20,415 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 48 [2021-02-22 02:20:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:20,415 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-02-22 02:20:20,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-02-22 02:20:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-22 02:20:20,418 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:20,418 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] [2021-02-22 02:20:20,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:20,419 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -569778108, now seen corresponding path program 1 times [2021-02-22 02:20:20,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:20,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554284356] [2021-02-22 02:20:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:20,424 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:20,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:20,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:20,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:20,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:20,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:20,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:20:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:20,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:20,577 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 02:20:20,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554284356] [2021-02-22 02:20:20,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:20,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:20,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912944731] [2021-02-22 02:20:20,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:20,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:20,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:20,581 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 5 states. [2021-02-22 02:20:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:20,869 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2021-02-22 02:20:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:20:20,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-22 02:20:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:20,875 INFO L225 Difference]: With dead ends: 169 [2021-02-22 02:20:20,876 INFO L226 Difference]: Without dead ends: 121 [2021-02-22 02:20:20,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:20:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-22 02:20:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2021-02-22 02:20:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-22 02:20:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-02-22 02:20:20,927 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 48 [2021-02-22 02:20:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:20,928 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-02-22 02:20:20,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-02-22 02:20:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-22 02:20:20,936 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:20,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:20,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:20,939 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1289191085, now seen corresponding path program 1 times [2021-02-22 02:20:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:20,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615564835] [2021-02-22 02:20:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:20,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:20,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:20,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:20:20,996 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:20:21,029 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:20:21,035 WARN L141 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size [2021-02-22 02:20:21,038 WARN L147 QuantifierPusher]: treesize reduction 14, result has 68.2 percent of original size 30 [2021-02-22 02:20:21,039 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:20:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:21,145 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:20:21,246 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:20:21,310 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:20:21,311 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:21,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:21,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:21 BoogieIcfgContainer [2021-02-22 02:20:21,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:21,336 INFO L168 Benchmark]: Toolchain (without parser) took 3118.24 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 114.6 MB in the beginning and 158.8 MB in the end (delta: -44.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:21,337 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:21,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.46 ms. Allocated memory is still 159.4 MB. Free memory was 113.5 MB in the beginning and 103.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:21,338 INFO L168 Benchmark]: Boogie Preprocessor took 47.69 ms. Allocated memory is still 159.4 MB. Free memory was 103.4 MB in the beginning and 101.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:21,339 INFO L168 Benchmark]: RCFGBuilder took 926.11 ms. Allocated memory is still 159.4 MB. Free memory was 101.4 MB in the beginning and 119.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:21,340 INFO L168 Benchmark]: TraceAbstraction took 1856.81 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 119.2 MB in the beginning and 158.8 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:21,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.46 ms. Allocated memory is still 159.4 MB. Free memory was 113.5 MB in the beginning and 103.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.69 ms. Allocated memory is still 159.4 MB. Free memory was 103.4 MB in the beginning and 101.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 926.11 ms. Allocated memory is still 159.4 MB. Free memory was 101.4 MB in the beginning and 119.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1856.81 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 119.2 MB in the beginning and 158.8 MB in the end (delta: -39.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a 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] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 0 [L34] i=0 [L34] COND TRUE i