/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/dijkstra-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:18:42,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:18:42,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:18:42,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:18:42,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:18:42,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:18:42,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:18:42,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:18:42,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:18:42,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:18:42,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:18:42,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:18:42,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:18:42,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:18:42,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:18:42,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:18:42,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:18:42,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:18:42,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:18:42,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:18:42,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:18:42,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:18:42,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:18:42,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:18:42,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:18:42,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:18:42,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:18:42,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:18:42,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:18:42,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:18:42,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:18:42,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:18:42,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:18:42,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:18:42,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:18:42,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:18:42,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:18:42,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:18:42,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:18:42,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:18:42,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:18:42,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:18:42,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:18:42,310 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:18:42,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:18:42,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:18:42,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:18:42,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:18:42,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:18:42,913 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:18:42,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2021-05-01 08:18:43,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ca1aaf33/1636ea0385714d3a99e60f4e21962530/FLAGccb750ce8 [2021-05-01 08:18:43,753 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:18:43,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2021-05-01 08:18:43,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ca1aaf33/1636ea0385714d3a99e60f4e21962530/FLAGccb750ce8 [2021-05-01 08:18:43,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ca1aaf33/1636ea0385714d3a99e60f4e21962530 [2021-05-01 08:18:43,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:18:43,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:18:43,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:18:43,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:18:43,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:18:43,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:18:43" (1/1) ... [2021-05-01 08:18:43,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654f58c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:43, skipping insertion in model container [2021-05-01 08:18:43,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:18:43" (1/1) ... [2021-05-01 08:18:43,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:18:43,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:18:43,961 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/dijkstra-u.c[533,546] [2021-05-01 08:18:44,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:18:44,115 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:18:44,131 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/dijkstra-u.c[533,546] [2021-05-01 08:18:44,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:18:44,201 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:18:44,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44 WrapperNode [2021-05-01 08:18:44,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:18:44,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:18:44,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:18:44,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:18:44,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (1/1) ... [2021-05-01 08:18:44,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:18:44,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:18:44,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:18:44,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:18:44,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (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 [2021-05-01 08:18:44,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:18:44,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:18:44,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:18:44,440 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:18:44,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:18:44,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:18:44,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:18:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:18:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:18:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:18:44,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:18:44,905 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:18:44,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:18:44 BoogieIcfgContainer [2021-05-01 08:18:44,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:18:44,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:18:44,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:18:44,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:18:44,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:18:43" (1/3) ... [2021-05-01 08:18:44,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6290f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:18:44, skipping insertion in model container [2021-05-01 08:18:44,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:44" (2/3) ... [2021-05-01 08:18:44,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6290f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:18:44, skipping insertion in model container [2021-05-01 08:18:44,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:18:44" (3/3) ... [2021-05-01 08:18:44,915 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2021-05-01 08:18:44,920 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:18:44,940 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:18:44,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:18:45,024 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:18:45,025 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:18:45,025 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:18:45,025 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:18:45,025 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:18:45,025 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:18:45,025 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:18:45,025 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:18:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-01 08:18:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-01 08:18:45,062 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:45,062 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:18:45,063 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 818818098, now seen corresponding path program 1 times [2021-05-01 08:18:45,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:45,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68004075] [2021-05-01 08:18:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:45,274 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:45,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:45,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:45,541 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:45,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:45,677 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:45,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:18:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:45,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:45,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:45,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:45,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:18:45,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:45,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68004075] [2021-05-01 08:18:45,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [68004075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:45,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:45,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:18:45,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591917069] [2021-05-01 08:18:45,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:18:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:18:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:18:45,762 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:18:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:18:48,019 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2021-05-01 08:18:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:18:48,022 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-01 08:18:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:18:48,030 INFO L225 Difference]: With dead ends: 65 [2021-05-01 08:18:48,030 INFO L226 Difference]: Without dead ends: 32 [2021-05-01 08:18:48,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:18:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-01 08:18:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-01 08:18:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-01 08:18:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-01 08:18:48,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-01 08:18:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:18:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-01 08:18:48,116 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:18:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-01 08:18:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 08:18:48,119 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:48,119 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:18:48,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:18:48,120 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1723375776, now seen corresponding path program 1 times [2021-05-01 08:18:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:48,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241203648] [2021-05-01 08:18:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:48,139 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:48,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:48,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:48,430 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.4 percent of original size [2021-05-01 08:18:48,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-05-01 08:18:48,530 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.5 percent of original size [2021-05-01 08:18:48,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 85 [2021-05-01 08:18:48,644 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:48,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:48,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,678 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:48,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:48,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:18:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:48,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:48,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:18:48,806 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:48,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241203648] [2021-05-01 08:18:48,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [241203648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:48,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:48,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 08:18:48,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072351320] [2021-05-01 08:18:48,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 08:18:48,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:48,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 08:18:48,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:18:48,809 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:04,669 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-01 08:19:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 08:19:04,676 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-05-01 08:19:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:04,677 INFO L225 Difference]: With dead ends: 48 [2021-05-01 08:19:04,678 INFO L226 Difference]: Without dead ends: 46 [2021-05-01 08:19:04,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:19:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-01 08:19:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-05-01 08:19:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:19:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-05-01 08:19:04,706 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2021-05-01 08:19:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:04,718 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-05-01 08:19:04,718 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-05-01 08:19:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-01 08:19:04,719 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:04,719 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:04,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:19:04,738 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:04,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1182987237, now seen corresponding path program 1 times [2021-05-01 08:19:04,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:04,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344340859] [2021-05-01 08:19:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:04,811 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-01 08:19:04,826 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:05,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:05,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:19:05,025 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-05-01 08:19:05,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 08:19:05,116 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-05-01 08:19:05,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-05-01 08:19:05,310 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2021-05-01 08:19:05,324 INFO L142 QuantifierPusher]: treesize reduction 17, result has 82.5 percent of original size [2021-05-01 08:19:05,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 08:19:05,399 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,400 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:05,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:05,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:05,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:05,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:05,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:05,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:05,537 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344340859] [2021-05-01 08:19:05,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344340859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:05,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:05,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 08:19:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598616270] [2021-05-01 08:19:05,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 08:19:05,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:05,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 08:19:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 08:19:05,541 INFO L87 Difference]: Start difference. First operand 40 states and 51 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:06,341 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-01 08:19:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:39,904 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-05-01 08:19:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 08:19:40,108 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-01 08:19:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:40,111 INFO L225 Difference]: With dead ends: 54 [2021-05-01 08:19:40,111 INFO L226 Difference]: Without dead ends: 52 [2021-05-01 08:19:40,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1193.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-01 08:19:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-01 08:19:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-05-01 08:19:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:19:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-01 08:19:40,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 21 [2021-05-01 08:19:40,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:40,132 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-01 08:19:40,132 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-01 08:19:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 08:19:40,133 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:40,133 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:40,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:19:40,133 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 979661061, now seen corresponding path program 1 times [2021-05-01 08:19:40,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:40,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160200941] [2021-05-01 08:19:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:40,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:40,167 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:19:40,167 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:19:40,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:19:40,188 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:19:40,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:19:40 BoogieIcfgContainer [2021-05-01 08:19:40,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:19:40,197 INFO L168 Benchmark]: Toolchain (without parser) took 56409.22 ms. Allocated memory was 189.8 MB in the beginning and 243.3 MB in the end (delta: 53.5 MB). Free memory was 154.2 MB in the beginning and 116.6 MB in the end (delta: 37.6 MB). Peak memory consumption was 91.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:40,197 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 189.8 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:19:40,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 416.27 ms. Allocated memory is still 189.8 MB. Free memory was 154.1 MB in the beginning and 172.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:40,198 INFO L168 Benchmark]: Boogie Preprocessor took 68.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.6 MB in the beginning and 170.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:40,198 INFO L168 Benchmark]: RCFGBuilder took 622.60 ms. Allocated memory is still 189.8 MB. Free memory was 170.5 MB in the beginning and 153.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:40,199 INFO L168 Benchmark]: TraceAbstraction took 55282.92 ms. Allocated memory was 189.8 MB in the beginning and 243.3 MB in the end (delta: 53.5 MB). Free memory was 153.3 MB in the beginning and 116.6 MB in the end (delta: 36.6 MB). Peak memory consumption was 91.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:40,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 189.8 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 416.27 ms. Allocated memory is still 189.8 MB. Free memory was 154.1 MB in the beginning and 172.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.6 MB in the beginning and 170.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 622.60 ms. Allocated memory is still 189.8 MB. Free memory was 170.5 MB in the beginning and 153.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 55282.92 ms. Allocated memory was 189.8 MB in the beginning and 243.3 MB in the end (delta: 53.5 MB). Free memory was 153.3 MB in the beginning and 116.6 MB in the end (delta: 36.6 MB). Peak memory consumption was 91.7 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 < 4294967295 / 4) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n < 4294967295 / 4) [L25] p = 0 [L26] q = 1 [L27] r = n [L28] h = 0 [L29] COND TRUE 1 [L30] COND TRUE !(q <= n) [L37] COND TRUE 1 [L38] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r < 2 * p + q) [L39] 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 55151.8ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 30.1ms, AutomataDifference: 52763.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 86 SDslu, 151 SDs, 0 SdLazy, 281 SolverSat, 84 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 48768.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1745.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 97.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 20 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...