/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/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:19:45,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:19:45,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:19:46,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:19:46,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:19:46,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:19:46,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:19:46,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:19:46,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:19:46,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:19:46,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:19:46,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:19:46,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:19:46,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:19:46,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:19:46,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:19:46,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:19:46,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:19:46,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:19:46,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:19:46,123 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 02:19:46,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:19:46,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:19:46,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:19:46,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:19:46,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:19:46,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:19:46,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:19:46,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:19:46,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:19:46,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:19:46,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:19:46,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:19:46,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:19:46,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:19:46,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:19:46,160 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:19:46,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:19:46,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:19:46,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:19:46,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:19:46,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:19:46,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:19:46,162 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:19:46,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:19:46,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:19:46,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:19:46,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:19:46,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:19:46,659 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:19:46,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2021-02-22 02:19:46,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d18e9ff70/4c6a5b4fe9fb4cc7bc147611236ecfaf/FLAGf6bc9b2d8 [2021-02-22 02:19:47,362 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:19:47,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2021-02-22 02:19:47,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d18e9ff70/4c6a5b4fe9fb4cc7bc147611236ecfaf/FLAGf6bc9b2d8 [2021-02-22 02:19:47,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d18e9ff70/4c6a5b4fe9fb4cc7bc147611236ecfaf [2021-02-22 02:19:47,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:19:47,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:19:47,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:47,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:19:47,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:19:47,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:47" (1/1) ... [2021-02-22 02:19:47,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47710b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:47, skipping insertion in model container [2021-02-22 02:19:47,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:47" (1/1) ... [2021-02-22 02:19:47,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:19:47,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:19:47,941 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/brs2f.c[588,601] [2021-02-22 02:19:47,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:47,973 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:19:47,989 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/brs2f.c[588,601] [2021-02-22 02:19:47,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:48,018 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:19:48,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48 WrapperNode [2021-02-22 02:19:48,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:48,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:19:48,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:19:48,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:19:48,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:19:48,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:19:48,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:19:48,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:19:48,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (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 02:19:48,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:19:48,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:19:48,257 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:19:48,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:19:48,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:19:48,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:19:48,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:19:48,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:19:48,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:19:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:19:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:19:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:19:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:19:48,262 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:19:48,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:19:48,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:19:48,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:19:48,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:19:48,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:19:48,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:19:48,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:19:48,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:19:48,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:19:48,879 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:19:48,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:48 BoogieIcfgContainer [2021-02-22 02:19:48,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:19:48,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:19:48,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:19:48,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:19:48,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:19:47" (1/3) ... [2021-02-22 02:19:48,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778c2aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:48, skipping insertion in model container [2021-02-22 02:19:48,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48" (2/3) ... [2021-02-22 02:19:48,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778c2aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:48, skipping insertion in model container [2021-02-22 02:19:48,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:48" (3/3) ... [2021-02-22 02:19:48,891 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2021-02-22 02:19:48,899 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:19:48,905 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:19:48,925 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:19:48,950 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:19:48,951 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:19:48,951 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:19:48,951 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:19:48,951 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:19:48,952 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:19:48,952 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:19:48,952 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:19:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2021-02-22 02:19:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:48,981 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:48,982 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] [2021-02-22 02:19:48,982 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1589495831, now seen corresponding path program 1 times [2021-02-22 02:19:48,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:49,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455818549] [2021-02-22 02:19:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:49,085 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,364 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 02:19:49,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455818549] [2021-02-22 02:19:49,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:49,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:19:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158565536] [2021-02-22 02:19:49,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:19:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:19:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:19:49,393 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2021-02-22 02:19:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:49,622 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-02-22 02:19:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:19:49,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-22 02:19:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:49,635 INFO L225 Difference]: With dead ends: 107 [2021-02-22 02:19:49,636 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 02:19:49,640 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 02:19:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 02:19:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-22 02:19:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-22 02:19:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-22 02:19:49,688 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-02-22 02:19:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:49,688 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-22 02:19:49,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:19:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-22 02:19:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:49,690 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:49,691 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] [2021-02-22 02:19:49,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:19:49,691 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1961847080, now seen corresponding path program 1 times [2021-02-22 02:19:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:49,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715391552] [2021-02-22 02:19:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:49,698 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:49,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:49,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:49,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:49,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:49,853 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 02:19:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715391552] [2021-02-22 02:19:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:19:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449628293] [2021-02-22 02:19:49,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:19:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:19:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:19:49,857 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 5 states. [2021-02-22 02:19:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:50,089 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-02-22 02:19:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:19:50,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-22 02:19:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:50,092 INFO L225 Difference]: With dead ends: 86 [2021-02-22 02:19:50,092 INFO L226 Difference]: Without dead ends: 61 [2021-02-22 02:19:50,094 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 02:19:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-22 02:19:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-02-22 02:19:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:19:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-02-22 02:19:50,115 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 35 [2021-02-22 02:19:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:50,115 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-02-22 02:19:50,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:19:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-02-22 02:19:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 02:19:50,117 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:50,118 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] [2021-02-22 02:19:50,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:19:50,118 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038414, now seen corresponding path program 1 times [2021-02-22 02:19:50,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:50,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104246998] [2021-02-22 02:19:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:50,197 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:50,222 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:50,229 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:50,229 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:50,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:50,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:50,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,241 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:50,243 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:50,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:50,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:50,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,254 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:50,256 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:50,256 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:50,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:19:50,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:50,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 02:19:50,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:50,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:50,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:50,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,524 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 02:19:50,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:19:50,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 02:19:50,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:50,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-22 02:19:50,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:50,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:50,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-22 02:19:50,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:50,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:50,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-22 02:19:50,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:50,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:19:50,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-02-22 02:19:50,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:19:50,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:50,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:19:50,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104246998] [2021-02-22 02:19:50,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:50,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 02:19:50,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247991542] [2021-02-22 02:19:50,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 02:19:50,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 02:19:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=193, Unknown=3, NotChecked=0, Total=240 [2021-02-22 02:19:50,847 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 16 states. [2021-02-22 02:19:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:51,753 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2021-02-22 02:19:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-22 02:19:51,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2021-02-22 02:19:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:51,756 INFO L225 Difference]: With dead ends: 108 [2021-02-22 02:19:51,756 INFO L226 Difference]: Without dead ends: 77 [2021-02-22 02:19:51,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=420, Unknown=3, NotChecked=0, Total=506 [2021-02-22 02:19:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-22 02:19:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-02-22 02:19:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-22 02:19:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-02-22 02:19:51,775 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 47 [2021-02-22 02:19:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:51,776 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-02-22 02:19:51,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 02:19:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-02-22 02:19:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-22 02:19:51,778 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:51,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:51,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:19:51,779 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1679168281, now seen corresponding path program 1 times [2021-02-22 02:19:51,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:51,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103280690] [2021-02-22 02:19:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:51,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,842 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:51,845 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:51,858 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:51,862 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:51,867 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:51,868 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:51,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,887 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:51,890 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:51,891 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:51,980 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:52,025 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:52,062 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:19:52,063 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:19:52,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:19:52,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:19:52 BoogieIcfgContainer [2021-02-22 02:19:52,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:19:52,085 INFO L168 Benchmark]: Toolchain (without parser) took 4339.88 ms. Allocated memory was 165.7 MB in the beginning and 206.6 MB in the end (delta: 40.9 MB). Free memory was 141.2 MB in the beginning and 102.7 MB in the end (delta: 38.5 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:52,085 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 165.7 MB. Free memory is still 140.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:19:52,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.93 ms. Allocated memory is still 165.7 MB. Free memory was 140.2 MB in the beginning and 130.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:52,087 INFO L168 Benchmark]: Boogie Preprocessor took 101.12 ms. Allocated memory is still 165.7 MB. Free memory was 130.3 MB in the beginning and 128.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:52,087 INFO L168 Benchmark]: RCFGBuilder took 758.80 ms. Allocated memory is still 165.7 MB. Free memory was 128.6 MB in the beginning and 141.2 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:52,088 INFO L168 Benchmark]: TraceAbstraction took 3200.19 ms. Allocated memory was 165.7 MB in the beginning and 206.6 MB in the end (delta: 40.9 MB). Free memory was 140.7 MB in the beginning and 102.7 MB in the end (delta: 38.0 MB). Peak memory consumption was 79.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:52,091 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 165.7 MB. Free memory is still 140.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.93 ms. Allocated memory is still 165.7 MB. Free memory was 140.2 MB in the beginning and 130.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 101.12 ms. Allocated memory is still 165.7 MB. Free memory was 130.3 MB in the beginning and 128.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 758.80 ms. Allocated memory is still 165.7 MB. Free memory was 128.6 MB in the beginning and 141.2 MB in the end (delta: -12.6 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3200.19 ms. Allocated memory was 165.7 MB in the beginning and 206.6 MB in the end (delta: 40.9 MB). Free memory was 140.7 MB in the beginning and 102.7 MB in the end (delta: 38.0 MB). Peak memory consumption was 79.4 MB. 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); [L31] i=0 [L31] COND TRUE i