/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/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:46:32,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:46:33,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:46:33,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:46:33,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:46:33,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:46:33,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:46:33,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:46:33,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:46:33,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:46:33,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:46:33,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:46:33,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:46:33,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:46:33,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:46:33,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:46:33,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:46:33,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:46:33,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:46:33,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:46:33,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:46:33,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:46:33,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:46:33,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:46:33,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:46:33,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:46:33,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:46:33,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:46:33,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:46:33,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:46:33,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:46:33,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:46:33,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:46:33,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:46:33,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:46:33,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:46:33,119 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:46:33,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:46:33,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:46:33,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:46:33,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:46:33,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:46:33,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:46:33,121 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:46:33,121 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:46:33,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:46:33,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:46:33,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:46:33,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:46:33,563 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:46:33,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2021-02-24 04:46:33,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d/FLAG623f748c9 [2021-02-24 04:46:34,350 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:46:34,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/modnf.c [2021-02-24 04:46:34,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d/FLAG623f748c9 [2021-02-24 04:46:34,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1542899/6a67904c5b8a409bab04cb1db45b004d [2021-02-24 04:46:34,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:46:34,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:46:34,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:34,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:46:34,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:46:34,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:34" (1/1) ... [2021-02-24 04:46:34,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ea6ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:34, skipping insertion in model container [2021-02-24 04:46:34,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:46:34" (1/1) ... [2021-02-24 04:46:34,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:46:34,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:46:34,936 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/modnf.c[588,601] [2021-02-24 04:46:34,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:34,969 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:46:34,985 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/modnf.c[588,601] [2021-02-24 04:46:34,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:46:35,014 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:46:35,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35 WrapperNode [2021-02-24 04:46:35,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:46:35,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:46:35,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:46:35,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:46:35,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... [2021-02-24 04:46:35,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:46:35,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:46:35,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:46:35,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:46:35,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:46:35,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:46:35,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:46:35,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:46:35,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:46:35,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:46:35,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:46:35,265 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:46:35,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:46:35,265 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:46:35,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:46:35,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:46:35,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:46:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:46:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:46:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:46:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:46:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:46:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:46:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:46:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:46:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:46:35,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:46:35,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:46:35,838 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 04:46:35,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:35 BoogieIcfgContainer [2021-02-24 04:46:35,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:46:35,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:46:35,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:46:35,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:46:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:46:34" (1/3) ... [2021-02-24 04:46:35,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f18d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:35, skipping insertion in model container [2021-02-24 04:46:35,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:46:35" (2/3) ... [2021-02-24 04:46:35,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f18d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:46:35, skipping insertion in model container [2021-02-24 04:46:35,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:46:35" (3/3) ... [2021-02-24 04:46:35,850 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2021-02-24 04:46:35,858 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:46:35,865 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:46:35,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:46:35,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:46:35,935 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:46:35,935 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:46:35,935 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:46:35,935 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:46:35,936 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:46:35,936 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:46:35,936 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:46:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2021-02-24 04:46:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 04:46:35,968 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:35,969 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] [2021-02-24 04:46:35,970 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash -774145788, now seen corresponding path program 1 times [2021-02-24 04:46:35,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:35,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240099589] [2021-02-24 04:46:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:36,073 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:46:36,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240099589] [2021-02-24 04:46:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:36,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:46:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429703547] [2021-02-24 04:46:36,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:46:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:46:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:36,463 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 3 states. [2021-02-24 04:46:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:36,628 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2021-02-24 04:46:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:46:36,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2021-02-24 04:46:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:36,639 INFO L225 Difference]: With dead ends: 111 [2021-02-24 04:46:36,640 INFO L226 Difference]: Without dead ends: 57 [2021-02-24 04:46:36,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:46:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-24 04:46:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-02-24 04:46:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-24 04:46:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-02-24 04:46:36,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 38 [2021-02-24 04:46:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:36,713 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-02-24 04:46:36,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:46:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-02-24 04:46:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-24 04:46:36,716 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:36,716 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] [2021-02-24 04:46:36,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:46:36,717 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:36,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1387502767, now seen corresponding path program 1 times [2021-02-24 04:46:36,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:36,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819717101] [2021-02-24 04:46:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:36,722 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:46:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:46:36,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:46:36,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:46:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 04:46:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:46:36,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:36,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:46:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:46:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819717101] [2021-02-24 04:46:36,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:46:36,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:46:36,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766465940] [2021-02-24 04:46:36,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:46:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:46:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:46:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:46:36,882 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2021-02-24 04:46:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:46:37,111 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-02-24 04:46:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:46:37,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-02-24 04:46:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:46:37,123 INFO L225 Difference]: With dead ends: 97 [2021-02-24 04:46:37,123 INFO L226 Difference]: Without dead ends: 75 [2021-02-24 04:46:37,125 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 [2021-02-24 04:46:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-24 04:46:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-02-24 04:46:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-24 04:46:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-02-24 04:46:37,163 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 38 [2021-02-24 04:46:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:46:37,167 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-02-24 04:46:37,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:46:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-02-24 04:46:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 04:46:37,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:46:37,170 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] [2021-02-24 04:46:37,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:46:37,170 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:46:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:46:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 388403656, now seen corresponding path program 1 times [2021-02-24 04:46:37,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:46:37,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528494063] [2021-02-24 04:46:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:46:37,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:37,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:46:37,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:46:37,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:46:37,238 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-24 04:46:37,253 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-24 04:46:37,258 WARN L141 QuantifierPusher]: treesize reduction 17, result has 63.8 percent of original size [2021-02-24 04:46:37,261 WARN L147 QuantifierPusher]: treesize reduction 17, result has 63.8 percent of original size 30 [2021-02-24 04:46:37,262 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:46:37,288 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 04:46:37,288 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:46:37,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:46:37,313 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 04:46:37,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:46:37 BoogieIcfgContainer [2021-02-24 04:46:37,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:46:37,316 INFO L168 Benchmark]: Toolchain (without parser) took 2585.25 ms. Allocated memory is still 151.0 MB. Free memory was 128.0 MB in the beginning and 105.6 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:37,316 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:46:37,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:37,318 INFO L168 Benchmark]: Boogie Preprocessor took 89.12 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:37,319 INFO L168 Benchmark]: RCFGBuilder took 731.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 133.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:37,320 INFO L168 Benchmark]: TraceAbstraction took 1471.98 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 105.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:46:37,323 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.97 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.12 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 731.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 133.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1471.98 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 105.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.3 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] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i