/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/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:29:25,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:29:25,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:29:25,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:29:25,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:29:25,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:29:25,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:29:25,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:29:25,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:29:25,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:29:25,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:29:25,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:29:25,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:29:25,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:29:25,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:29:25,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:29:25,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:29:25,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:29:25,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:29:25,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:29:25,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:29:25,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:29:25,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:29:25,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:29:25,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:29:25,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:29:25,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:29:25,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:29:25,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:29:25,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:29:25,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:25,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:29:25,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:29:25,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:29:25,228 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:29:25,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:29:25,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:29:25,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:29:25,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:29:25,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:29:25,520 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:29:25,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2021-05-02 23:29:25,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b1e5a9f3/d4d1a13db2184773aa8e227216b7c989/FLAG11b14910b [2021-05-02 23:29:25,913 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:29:25,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2021-05-02 23:29:25,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b1e5a9f3/d4d1a13db2184773aa8e227216b7c989/FLAG11b14910b [2021-05-02 23:29:26,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b1e5a9f3/d4d1a13db2184773aa8e227216b7c989 [2021-05-02 23:29:26,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:29:26,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:29:26,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:26,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:29:26,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:29:26,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7577e6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26, skipping insertion in model container [2021-05-02 23:29:26,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:29:26,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:29:26,458 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c[327,340] [2021-05-02 23:29:26,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:26,471 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:29:26,479 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c[327,340] [2021-05-02 23:29:26,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:26,490 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:29:26,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26 WrapperNode [2021-05-02 23:29:26,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:26,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:29:26,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:29:26,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:29:26,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (1/1) ... [2021-05-02 23:29:26,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:29:26,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:29:26,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:29:26,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:29:26,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (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 [2021-05-02 23:29:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:29:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:29:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:29:26,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:29:26,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:29:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:29:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:29:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:29:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:29:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:29:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:29:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:29:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:29:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:29:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:29:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:29:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:29:26,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:29:26,797 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:29:26,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:26 BoogieIcfgContainer [2021-05-02 23:29:26,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:29:26,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:29:26,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:29:26,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:29:26,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:29:26" (1/3) ... [2021-05-02 23:29:26,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cb70d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:26, skipping insertion in model container [2021-05-02 23:29:26,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:26" (2/3) ... [2021-05-02 23:29:26,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cb70d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:26, skipping insertion in model container [2021-05-02 23:29:26,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:26" (3/3) ... [2021-05-02 23:29:26,803 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2021-05-02 23:29:26,807 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:29:26,810 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:29:26,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:29:26,844 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:29:26,844 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:29:26,844 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:29:26,844 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:29:26,844 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:29:26,844 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:29:26,845 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:29:26,845 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:29:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:26,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:26,865 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:26,866 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-02 23:29:26,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:26,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660358158] [2021-05-02 23:29:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:26,921 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:27,075 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:27,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660358158] [2021-05-02 23:29:27,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [660358158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:27,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:27,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:29:27,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997144720] [2021-05-02 23:29:27,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:29:27,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:29:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:27,089 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:27,133 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 23:29:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:29:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:29:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:27,139 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:29:27,139 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 23:29:27,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 23:29:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 23:29:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 23:29:27,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 23:29:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:27,167 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 23:29:27,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 23:29:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:27,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:27,168 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:27,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:29:27,168 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-02 23:29:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857468667] [2021-05-02 23:29:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:27,171 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:27,298 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:27,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857468667] [2021-05-02 23:29:27,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [857468667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:27,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:27,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:29:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117300585] [2021-05-02 23:29:27,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:29:27,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:29:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:29:27,300 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:27,420 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 23:29:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:29:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:29:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:27,421 INFO L225 Difference]: With dead ends: 18 [2021-05-02 23:29:27,421 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:29:27,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:29:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:29:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:29:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:29:27,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:29:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:27,428 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:29:27,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:29:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:29:27,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:27,429 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:27,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:29:27,429 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:27,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-02 23:29:27,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:27,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137009417] [2021-05-02 23:29:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:27,460 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:27,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:27,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:27,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137009417] [2021-05-02 23:29:27,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137009417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:27,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:27,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:29:27,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555052691] [2021-05-02 23:29:27,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:29:27,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:29:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:29:27,553 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:27,638 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 23:29:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:29:27,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:29:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:27,639 INFO L225 Difference]: With dead ends: 19 [2021-05-02 23:29:27,639 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:29:27,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:29:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:29:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:29:27,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:29:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:27,644 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:29:27,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:29:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:29:27,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:27,645 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:27,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:29:27,645 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1738481436, now seen corresponding path program 2 times [2021-05-02 23:29:27,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:27,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183075907] [2021-05-02 23:29:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:27,648 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:27,650 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:27,719 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:27,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183075907] [2021-05-02 23:29:27,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1183075907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:27,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:27,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:29:27,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417958768] [2021-05-02 23:29:27,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:29:27,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:29:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:29:27,721 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:27,855 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 23:29:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:29:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:29:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:27,856 INFO L225 Difference]: With dead ends: 20 [2021-05-02 23:29:27,856 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:29:27,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:29:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:29:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:29:27,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 23:29:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:27,861 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:29:27,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:29:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:29:27,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:27,861 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:27,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:29:27,862 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1905189066, now seen corresponding path program 3 times [2021-05-02 23:29:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:27,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991365705] [2021-05-02 23:29:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:27,868 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:27,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:27,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991365705] [2021-05-02 23:29:27,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [991365705] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:27,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:27,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:29:27,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864086938] [2021-05-02 23:29:27,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:29:27,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:29:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:27,987 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:28,108 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 23:29:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:29:28,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:29:28,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:28,110 INFO L225 Difference]: With dead ends: 21 [2021-05-02 23:29:28,110 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:29:28,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:29:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:29:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:29:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:29:28,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 23:29:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:28,120 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:29:28,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:29:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:29:28,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:28,121 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:28,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:29:28,122 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 4 times [2021-05-02 23:29:28,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:28,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29623033] [2021-05-02 23:29:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:28,128 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:28,131 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:28,244 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29623033] [2021-05-02 23:29:28,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [29623033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:28,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:28,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:29:28,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136753649] [2021-05-02 23:29:28,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:29:28,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:29:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:29:28,246 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:28,428 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:29:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:29:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:29:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:28,453 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:29:28,453 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:29:28,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:29:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:29:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:29:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:29:28,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-02 23:29:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:28,458 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:29:28,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:29:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:29:28,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:28,459 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:28,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:29:28,459 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:28,459 INFO L82 PathProgramCache]: Analyzing trace with hash -63863818, now seen corresponding path program 5 times [2021-05-02 23:29:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:28,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739915476] [2021-05-02 23:29:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:28,463 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:28,464 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:28,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:28,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739915476] [2021-05-02 23:29:28,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739915476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:28,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:28,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:29:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523669352] [2021-05-02 23:29:28,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:29:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:29:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:28,596 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:28,802 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 23:29:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:29:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 23:29:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:28,803 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:29:28,803 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:29:28,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:29:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:29:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:29:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:29:28,807 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-02 23:29:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:28,807 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:29:28,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:29:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:29:28,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:28,808 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:28,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:29:28,808 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317092, now seen corresponding path program 6 times [2021-05-02 23:29:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:28,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218168849] [2021-05-02 23:29:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:28,812 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:28,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:28,991 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218168849] [2021-05-02 23:29:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218168849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:28,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:28,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:29:28,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031250371] [2021-05-02 23:29:28,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:29:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:29:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:29:28,995 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:29,309 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-05-02 23:29:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:29:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:29:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:29,318 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:29:29,319 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:29:29,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:29:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:29:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:29:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 23:29:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:29:29,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-02 23:29:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:29,320 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:29:29,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:29:29,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:29:29,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:29:29,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:29:29,580 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2021-05-02 23:29:29,608 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 23:29:29,609 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 23:29:29,609 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 23:29:29,609 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,609 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L194 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse2 (div main_~x~0 4294967296))) (let ((.cse1 (< 0 (+ .cse2 1)))) (or (let ((.cse0 (* 4294967296 .cse2))) (and (< (+ .cse0 5) main_~x~0) .cse1 (<= main_~x~0 (+ .cse0 6)))) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (and .cse1 (<= main_~x~0 4))))) [2021-05-02 23:29:29,610 INFO L194 CegarLoopUtils]: At program point L16-3(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (< 0 (+ .cse1 1)) (<= main_~x~0 (+ .cse0 6))))) [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2021-05-02 23:29:29,610 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 23:29:29,611 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-05-02 23:29:29,611 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:29:29,611 INFO L194 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:29:29,611 INFO L201 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-05-02 23:29:29,611 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:29:29,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:29:29 BoogieIcfgContainer [2021-05-02 23:29:29,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:29:29,624 INFO L168 Benchmark]: Toolchain (without parser) took 3297.48 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 155.0 MB in the beginning and 156.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 48.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:29,624 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:29:29,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.02 ms. Allocated memory is still 188.7 MB. Free memory was 154.8 MB in the beginning and 145.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:29,625 INFO L168 Benchmark]: Boogie Preprocessor took 18.31 ms. Allocated memory is still 188.7 MB. Free memory was 145.6 MB in the beginning and 144.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:29,625 INFO L168 Benchmark]: RCFGBuilder took 272.96 ms. Allocated memory is still 188.7 MB. Free memory was 144.1 MB in the beginning and 161.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:29,625 INFO L168 Benchmark]: TraceAbstraction took 2824.04 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 160.9 MB in the beginning and 156.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 53.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:29,626 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 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 163.02 ms. Allocated memory is still 188.7 MB. Free memory was 154.8 MB in the beginning and 145.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.31 ms. Allocated memory is still 188.7 MB. Free memory was 145.6 MB in the beginning and 144.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.96 ms. Allocated memory is still 188.7 MB. Free memory was 144.1 MB in the beginning and 161.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2824.04 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 160.9 MB in the beginning and 156.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 53.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2479.0ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 13.4ms, AutomataDifference: 1276.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 287.2ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 82 SDtfs, 50 SDslu, 131 SDs, 0 SdLazy, 253 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 271.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1197.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 66 PreInvPairs, 94 NumberOfFragments, 128 HoareAnnotationTreeSize, 66 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 100.0ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 527 FormulaSimplificationTreeSizeReductionInter, 177.3ms HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((4294967296 * (x / 4294967296) + 5 < x && 0 < x / 4294967296 + 1) && x <= 4294967296 * (x / 4294967296) + 6) || (x <= 5 && 5 <= x)) || (0 < x / 4294967296 + 1 && x <= 4) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...