/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:04:58,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:04:58,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:04:58,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:04:58,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:04:58,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:04:58,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:04:58,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:04:58,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:04:58,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:04:58,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:04:58,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:04:58,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:04:58,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:04:58,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:04:58,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:04:58,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:04:58,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:04:58,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:04:58,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:04:58,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:04:58,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:04:58,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:04:58,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:04:58,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:04:58,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:04:58,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:04:58,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:04:58,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:04:58,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:04:58,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:04:58,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:04:58,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:04:58,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:04:58,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:04:58,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:04:58,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:04:58,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:04:58,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:04:58,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:04:58,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:04:58,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:04:58,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:04:58,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:04:58,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:04:58,282 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:04:58,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:04:58,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:04:58,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:04:58,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:04:58,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:04:58,645 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:04:58,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-04-16 08:04:58,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee95b039/4e7cbdce37714125a49f6039961847df/FLAGea1d78c2c [2021-04-16 08:04:59,144 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:04:59,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-04-16 08:04:59,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee95b039/4e7cbdce37714125a49f6039961847df/FLAGea1d78c2c [2021-04-16 08:04:59,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee95b039/4e7cbdce37714125a49f6039961847df [2021-04-16 08:04:59,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:04:59,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:04:59,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:04:59,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:04:59,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:04:59,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75da6284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59, skipping insertion in model container [2021-04-16 08:04:59,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:04:59,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:04:59,299 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c[533,546] [2021-04-16 08:04:59,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:04:59,327 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:04:59,382 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c[533,546] [2021-04-16 08:04:59,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:04:59,406 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:04:59,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59 WrapperNode [2021-04-16 08:04:59,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:04:59,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:04:59,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:04:59,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:04:59,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (1/1) ... [2021-04-16 08:04:59,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:04:59,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:04:59,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:04:59,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:04:59,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (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 [2021-04-16 08:04:59,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:04:59,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:04:59,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:04:59,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:04:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:04:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:04:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:04:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:04:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:04:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:04:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:04:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:04:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:04:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:04:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:04:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:04:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:04:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:04:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:04:59,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:04:59,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:04:59,856 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:04:59,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:04:59 BoogieIcfgContainer [2021-04-16 08:04:59,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:04:59,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:04:59,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:04:59,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:04:59,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:04:59" (1/3) ... [2021-04-16 08:04:59,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2ad34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:04:59, skipping insertion in model container [2021-04-16 08:04:59,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:59" (2/3) ... [2021-04-16 08:04:59,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2ad34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:04:59, skipping insertion in model container [2021-04-16 08:04:59,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:04:59" (3/3) ... [2021-04-16 08:04:59,864 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.c [2021-04-16 08:04:59,870 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:04:59,873 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:04:59,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:04:59,905 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:04:59,905 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:04:59,905 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:04:59,905 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:04:59,905 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:04:59,906 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:04:59,906 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:04:59,906 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:04:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-04-16 08:04:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-16 08:04:59,921 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:04:59,922 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:04:59,922 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:04:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:04:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-04-16 08:04:59,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:04:59,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096871305] [2021-04-16 08:04:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:04:59,979 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:05:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:00,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:05:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:00,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:05:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:00,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,133 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:05:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:00,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:00,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:05:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096871305] [2021-04-16 08:05:00,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:05:00,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:05:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354873825] [2021-04-16 08:05:00,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:05:00,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:05:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:05:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:05:00,173 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-04-16 08:05:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:05:05,084 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-04-16 08:05:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:05:05,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-04-16 08:05:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:05:05,093 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:05:05,093 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:05:05,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:05:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:05:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:05:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-04-16 08:05:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-04-16 08:05:05,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-04-16 08:05:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:05:05,187 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-04-16 08:05:05,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-04-16 08:05:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-04-16 08:05:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-16 08:05:05,189 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:05:05,189 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:05:05,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:05:05,190 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:05:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:05:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-04-16 08:05:05,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:05:05,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756599439] [2021-04-16 08:05:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:05:05,194 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:05:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:05,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:05,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:05:05,376 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-04-16 08:05:05,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-04-16 08:05:05,470 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-04-16 08:05:05,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-04-16 08:05:05,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:05:05,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:05:05,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:05:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:05,662 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:05:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:05,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:05:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:05,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:05,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:05:05,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756599439] [2021-04-16 08:05:05,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:05:05,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 08:05:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161774175] [2021-04-16 08:05:05,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 08:05:05,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:05:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 08:05:05,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 08:05:05,682 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:05:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:05:18,554 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-04-16 08:05:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 08:05:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-04-16 08:05:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:05:18,558 INFO L225 Difference]: With dead ends: 48 [2021-04-16 08:05:18,558 INFO L226 Difference]: Without dead ends: 46 [2021-04-16 08:05:18,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-16 08:05:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-04-16 08:05:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-04-16 08:05:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-04-16 08:05:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-04-16 08:05:18,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-04-16 08:05:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:05:18,579 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-04-16 08:05:18,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:05:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-04-16 08:05:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-16 08:05:18,580 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:05:18,580 INFO L519 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] [2021-04-16 08:05:18,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:05:18,580 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:05:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:05:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-04-16 08:05:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:05:18,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691144089] [2021-04-16 08:05:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:05:18,584 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:05:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:18,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:18,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:05:18,681 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-04-16 08:05:18,682 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-16 08:05:18,703 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-04-16 08:05:18,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-04-16 08:05:18,769 INFO L142 QuantifierPusher]: treesize reduction 8, result has 91.8 percent of original size [2021-04-16 08:05:18,776 INFO L147 QuantifierPusher]: treesize reduction 9, result has 89.9 percent of original size 80 [2021-04-16 08:05:18,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:05:18,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:05:18,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:18,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:05:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:18,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:05:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:18,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:18,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:05:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:05:18,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:05:18,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:05:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:05:18,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691144089] [2021-04-16 08:05:18,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:05:18,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-16 08:05:18,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344360224] [2021-04-16 08:05:18,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-16 08:05:18,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:05:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-16 08:05:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-16 08:05:18,975 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:05:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:05:44,092 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-04-16 08:05:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 08:05:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-04-16 08:05:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:05:44,259 INFO L225 Difference]: With dead ends: 54 [2021-04-16 08:05:44,260 INFO L226 Difference]: Without dead ends: 52 [2021-04-16 08:05:44,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 672.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-16 08:05:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-04-16 08:05:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-04-16 08:05:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-04-16 08:05:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-04-16 08:05:44,288 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 26 [2021-04-16 08:05:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:05:44,288 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-04-16 08:05:44,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:05:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-04-16 08:05:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-16 08:05:44,289 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:05:44,289 INFO L519 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] [2021-04-16 08:05:44,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:05:44,290 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:05:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:05:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-04-16 08:05:44,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:05:44,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48997247] [2021-04-16 08:05:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:05:44,293 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:05:44,322 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:05:44,323 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:05:44,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:05:44,345 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:05:44,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:05:44 BoogieIcfgContainer [2021-04-16 08:05:44,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:05:44,347 INFO L168 Benchmark]: Toolchain (without parser) took 45170.86 ms. Allocated memory is still 188.7 MB. Free memory was 154.1 MB in the beginning and 116.9 MB in the end (delta: 37.2 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:44,351 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:05:44,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.46 ms. Allocated memory is still 188.7 MB. Free memory was 153.9 MB in the beginning and 171.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:44,352 INFO L168 Benchmark]: Boogie Preprocessor took 34.96 ms. Allocated memory is still 188.7 MB. Free memory was 171.3 MB in the beginning and 169.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:44,352 INFO L168 Benchmark]: RCFGBuilder took 414.97 ms. Allocated memory is still 188.7 MB. Free memory was 169.7 MB in the beginning and 151.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:44,353 INFO L168 Benchmark]: TraceAbstraction took 44486.64 ms. Allocated memory is still 188.7 MB. Free memory was 151.3 MB in the beginning and 116.9 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:44,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.46 ms. Allocated memory is still 188.7 MB. Free memory was 153.9 MB in the beginning and 171.3 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.96 ms. Allocated memory is still 188.7 MB. Free memory was 171.3 MB in the beginning and 169.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 414.97 ms. Allocated memory is still 188.7 MB. Free memory was 169.7 MB in the beginning and 151.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 44486.64 ms. Allocated memory is still 188.7 MB. Free memory was 151.3 MB in the beginning and 116.9 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_unsigned_int() [L23] CALL assume_abort_if_not(n>=0 && n<=50) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=50) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 44423.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 11.5ms, AutomataDifference: 43101.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 107 SDtfs, 87 SDslu, 148 SDs, 0 SdLazy, 274 SolverSat, 81 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 38580.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1292.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=2, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...