/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -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-6253b08 [2021-05-06 12:23:59,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:23:59,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:23:59,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:23:59,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:23:59,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:23:59,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:23:59,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:23:59,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:23:59,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:23:59,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:23:59,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:23:59,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:23:59,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:23:59,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:23:59,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:23:59,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:23:59,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:23:59,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:23:59,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:23:59,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:23:59,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:23:59,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:23:59,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:23:59,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:23:59,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:23:59,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:23:59,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:23:59,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:23:59,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:23:59,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:23:59,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:23:59,763 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:23:59,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:24:00,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:24:00,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:24:00,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:24:00,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:24:00,076 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:24:00,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-05-06 12:24:00,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4013d2c/084f4afc6aae467ebde0142aa79fd835/FLAGd5f7aa614 [2021-05-06 12:24:00,591 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:24:00,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-05-06 12:24:00,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4013d2c/084f4afc6aae467ebde0142aa79fd835/FLAGd5f7aa614 [2021-05-06 12:24:01,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a4013d2c/084f4afc6aae467ebde0142aa79fd835 [2021-05-06 12:24:01,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:24:01,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:24:01,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:24:01,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:24:01,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:24:01,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1050b0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01, skipping insertion in model container [2021-05-06 12:24:01,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:24:01,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:24:01,256 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-scaling/dijkstra-u_valuebound50.c[533,546] [2021-05-06 12:24:01,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:24:01,294 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:24:01,304 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-scaling/dijkstra-u_valuebound50.c[533,546] [2021-05-06 12:24:01,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:24:01,328 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:24:01,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01 WrapperNode [2021-05-06 12:24:01,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:24:01,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:24:01,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:24:01,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:24:01,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (1/1) ... [2021-05-06 12:24:01,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:24:01,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:24:01,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:24:01,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:24:01,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (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 [2021-05-06 12:24:01,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:24:01,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:24:01,460 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:24:01,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:24:01,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:24:01,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:24:01,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:24:01,461 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:24:01,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:24:01,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:24:01,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:24:01,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:24:01,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:24:01,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:24:01,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:24:01,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:24:01,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:24:01,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:24:01,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:24:01,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:24:01,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:24:01,795 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:24:01,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:24:01 BoogieIcfgContainer [2021-05-06 12:24:01,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:24:01,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:24:01,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:24:01,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:24:01,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:24:01" (1/3) ... [2021-05-06 12:24:01,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6050e4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:24:01, skipping insertion in model container [2021-05-06 12:24:01,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:24:01" (2/3) ... [2021-05-06 12:24:01,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6050e4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:24:01, skipping insertion in model container [2021-05-06 12:24:01,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:24:01" (3/3) ... [2021-05-06 12:24:01,802 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.c [2021-05-06 12:24:01,822 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:24:01,825 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:24:01,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:24:01,862 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:24:01,862 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:24:01,862 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:24:01,862 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:24:01,862 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:24:01,862 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:24:01,862 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:24:01,862 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:24:01,872 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) [2021-05-06 12:24:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:24:01,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:24:01,885 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:24:01,885 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:24:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:24:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-06 12:24:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:24:01,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897199091] [2021-05-06 12:24:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:24:01,948 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:24:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:02,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:24:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:24:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:02,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:24:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:24:02,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:24:02,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897199091] [2021-05-06 12:24:02,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [897199091] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:24:02,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:24:02,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:24:02,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401513623] [2021-05-06 12:24:02,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:24:02,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:24:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:24:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:24:02,163 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) [2021-05-06 12:30:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:30:40,439 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-06 12:30:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:30:40,440 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 [2021-05-06 12:30:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:30:40,445 INFO L225 Difference]: With dead ends: 69 [2021-05-06 12:30:40,445 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 12:30:40,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:30:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 12:30:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 12:30:40,482 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) [2021-05-06 12:30:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 12:30:40,484 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-06 12:30:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:30:40,485 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 12:30:40,485 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) [2021-05-06 12:30:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 12:30:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 12:30:40,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:30:40,486 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:30:40,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:30:40,487 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:30:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:30:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-06 12:30:40,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:30:40,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830517931] [2021-05-06 12:30:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:30:40,490 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:30:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:30:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:40,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:30:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:40,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:30:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:30:40,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:30:40,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830517931] [2021-05-06 12:30:40,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830517931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:30:40,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:30:40,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 12:30:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352962593] [2021-05-06 12:30:40,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 12:30:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:30:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 12:30:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:30:40,850 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)