/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/loops-crafted-1/in-de20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:58:01,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:58:01,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:58:01,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:58:01,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:58:01,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:58:01,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:58:01,177 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 23:58:01,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:58:01,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:58:01,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:58:01,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:58:01,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:58:01,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:58:01,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:58:01,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:58:01,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:58:01,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:58:01,191 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:58:01,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:58:01,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:58:01,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:58:01,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:58:01,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:58:01,444 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:58:01,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de20.c [2021-05-02 23:58:01,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51f8995b/64b51e17393641e491f2f361db768cac/FLAG74776ba93 [2021-05-02 23:58:01,797 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:58:01,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de20.c [2021-05-02 23:58:01,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51f8995b/64b51e17393641e491f2f361db768cac/FLAG74776ba93 [2021-05-02 23:58:02,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f51f8995b/64b51e17393641e491f2f361db768cac [2021-05-02 23:58:02,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:58:02,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:58:02,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:58:02,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:58:02,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:58:02,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d44d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02, skipping insertion in model container [2021-05-02 23:58:02,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:58:02,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:58:02,348 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de20.c[368,381] [2021-05-02 23:58:02,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:58:02,363 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:58:02,370 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de20.c[368,381] [2021-05-02 23:58:02,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:58:02,414 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:58:02,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02 WrapperNode [2021-05-02 23:58:02,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:58:02,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:58:02,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:58:02,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:58:02,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (1/1) ... [2021-05-02 23:58:02,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:58:02,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:58:02,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:58:02,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:58:02,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (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 23:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:58:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:58:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:58:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:58:02,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:58:02,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:58:02,699 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:58:02,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:58:02 BoogieIcfgContainer [2021-05-02 23:58:02,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:58:02,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:58:02,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:58:02,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:58:02,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:58:02" (1/3) ... [2021-05-02 23:58:02,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4816a9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:58:02, skipping insertion in model container [2021-05-02 23:58:02,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:58:02" (2/3) ... [2021-05-02 23:58:02,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4816a9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:58:02, skipping insertion in model container [2021-05-02 23:58:02,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:58:02" (3/3) ... [2021-05-02 23:58:02,705 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de20.c [2021-05-02 23:58:02,709 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:58:02,711 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:58:02,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:58:02,749 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:58:02,749 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:58:02,749 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:58:02,749 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:58:02,749 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:58:02,749 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:58:02,749 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:58:02,749 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:58:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 23:58:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:58:02,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:02,768 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:02,768 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:02,772 INFO L82 PathProgramCache]: Analyzing trace with hash 449096471, now seen corresponding path program 1 times [2021-05-02 23:58:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:02,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270493079] [2021-05-02 23:58:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:02,840 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:58:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:03,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:03,134 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 23:58:03,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:03,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270493079] [2021-05-02 23:58:03,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [270493079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:03,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:03,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:58:03,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552037974] [2021-05-02 23:58:03,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:58:03,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:58:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:58:03,157 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 6 states, 6 states have (on average 1.5) internal successors, (9), 4 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 23:58:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:03,391 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 23:58:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:58:03,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 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 23:58:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:03,397 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:58:03,397 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:58:03,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:58:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:58:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:58:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 23:58:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 23:58:03,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2021-05-02 23:58:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:03,429 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 23:58:03,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 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 23:58:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 23:58:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:58:03,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:03,430 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:03,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:58:03,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1071583787, now seen corresponding path program 1 times [2021-05-02 23:58:03,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:03,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456907763] [2021-05-02 23:58:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:03,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~z~0_7 4294967296)) InVars {main_~z~0=v_main_~z~0_7} OutVars{main_~z~0=v_main_~z~0_7} AuxVars[] AssignedVars[] [2021-05-02 23:58:03,481 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:03,543 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:03,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:03,634 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:03,669 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:03,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:03,903 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 23:58:03,911 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:03,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456907763] [2021-05-02 23:58:03,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [456907763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:03,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:03,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:58:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977896059] [2021-05-02 23:58:03,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:58:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:58:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:58:03,914 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 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 23:58:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:03,995 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 23:58:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:58:03,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 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 23:58:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:03,997 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:58:03,997 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:58:03,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:58:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:58:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:58:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 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 23:58:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 23:58:04,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2021-05-02 23:58:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:04,006 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 23:58:04,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 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 23:58:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 23:58:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:58:04,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:04,007 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:04,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:58:04,008 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1025479988, now seen corresponding path program 1 times [2021-05-02 23:58:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560909946] [2021-05-02 23:58:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:04,019 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_14 4294967296)) InVars {main_~x~0=v_main_~x~0_14} OutVars{main_~x~0=v_main_~x~0_14} AuxVars[] AssignedVars[] [2021-05-02 23:58:04,030 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:04,046 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:04,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:04,106 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:04,133 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:04,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:04,375 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 23:58:04,536 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:04,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560909946] [2021-05-02 23:58:04,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560909946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:04,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:04,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:58:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315375047] [2021-05-02 23:58:04,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:58:04,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:58:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:58:04,538 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:58:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:05,025 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 23:58:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:58:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:58:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:05,027 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:58:05,027 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:58:05,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:58:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:58:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 23:58:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 23:58:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-05-02 23:58:05,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2021-05-02 23:58:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:05,036 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-05-02 23:58:05,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 23:58:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-05-02 23:58:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:58:05,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:05,037 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:05,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:58:05,038 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -834915316, now seen corresponding path program 1 times [2021-05-02 23:58:05,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:05,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683557580] [2021-05-02 23:58:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:05,044 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_18 4294967296)) InVars {main_~x~0=v_main_~x~0_18} OutVars{main_~x~0=v_main_~x~0_18} AuxVars[] AssignedVars[] [2021-05-02 23:58:05,050 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:05,063 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,088 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:05,115 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:05,147 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:05,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:05,569 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 23:58:05,850 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683557580] [2021-05-02 23:58:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683557580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:05,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:05,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:58:05,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844988067] [2021-05-02 23:58:05,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:58:05,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:05,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:58:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:58:05,851 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:06,277 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2021-05-02 23:58:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:06,740 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 23:58:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:58:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:06,741 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:58:06,741 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:58:06,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:58:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:58:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 23:58:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 23:58:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 23:58:06,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-05-02 23:58:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:06,746 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 23:58:06,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 23:58:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:58:06,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:06,747 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:06,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:58:06,747 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash 778520620, now seen corresponding path program 2 times [2021-05-02 23:58:06,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:06,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995590582] [2021-05-02 23:58:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:06,752 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_22 4294967296)) InVars {main_~x~0=v_main_~x~0_22} OutVars{main_~x~0=v_main_~x~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:58:06,755 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:06,756 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:06,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:06,808 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:06,829 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:07,001 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 23:58:07,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:07,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995590582] [2021-05-02 23:58:07,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995590582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:07,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:07,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:58:07,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060709326] [2021-05-02 23:58:07,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:58:07,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:58:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:58:07,186 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:08,079 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 23:58:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:58:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:08,080 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:58:08,081 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:58:08,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:58:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:58:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-02 23:58:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 23:58:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 23:58:08,087 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2021-05-02 23:58:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:08,087 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 23:58:08,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 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 23:58:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 23:58:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:58:08,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:08,088 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:08,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:58:08,088 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1418492661, now seen corresponding path program 2 times [2021-05-02 23:58:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:08,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113044292] [2021-05-02 23:58:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:08,096 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_28 4294967296)) InVars {main_~x~0=v_main_~x~0_28} OutVars{main_~x~0=v_main_~x~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:58:08,099 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:08,111 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:08,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:08,150 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:08,176 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:08,527 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 23:58:08,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:08,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113044292] [2021-05-02 23:58:08,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [113044292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:08,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:08,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:58:08,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563038723] [2021-05-02 23:58:08,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:58:08,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:58:08,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:58:08,890 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:09,057 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-05-02 23:58:09,435 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2021-05-02 23:58:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:09,841 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-02 23:58:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:58:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 18 [2021-05-02 23:58:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:09,842 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:58:09,842 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:58:09,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:58:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:58:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-05-02 23:58:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 23:58:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-02 23:58:09,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2021-05-02 23:58:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:09,865 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-02 23:58:09,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-02 23:58:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:58:09,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:09,866 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:09,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:58:09,867 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1937848684, now seen corresponding path program 3 times [2021-05-02 23:58:09,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:09,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117178763] [2021-05-02 23:58:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:09,872 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_33 4294967296)) InVars {main_~x~0=v_main_~x~0_33} OutVars{main_~x~0=v_main_~x~0_33} AuxVars[] AssignedVars[] [2021-05-02 23:58:09,875 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:09,888 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:09,919 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:09,936 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:09,961 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:10,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:10,267 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 23:58:10,471 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117178763] [2021-05-02 23:58:10,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [117178763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:10,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:10,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:58:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883630842] [2021-05-02 23:58:10,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:58:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:58:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:58:10,472 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:11,655 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 23:58:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:58:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 18 [2021-05-02 23:58:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:11,656 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:58:11,656 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:58:11,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1217.0ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:58:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:58:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 23:58:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 23:58:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 23:58:11,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2021-05-02 23:58:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:11,659 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 23:58:11,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 23:58:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:58:11,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:11,660 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:11,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:58:11,660 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash -743682676, now seen corresponding path program 3 times [2021-05-02 23:58:11,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:11,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852846945] [2021-05-02 23:58:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:11,668 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_39 4294967296)) InVars {main_~x~0=v_main_~x~0_39} OutVars{main_~x~0=v_main_~x~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:58:11,670 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:11,682 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,704 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:11,737 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:11,758 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:11,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:11,913 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 23:58:12,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:12,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852846945] [2021-05-02 23:58:12,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [852846945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:12,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:12,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:58:12,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159592379] [2021-05-02 23:58:12,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:58:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:58:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:58:12,207 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:13,081 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-05-02 23:58:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:13,281 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 23:58:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:58:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 18 [2021-05-02 23:58:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:13,283 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:58:13,283 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:58:13,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:58:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:58:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-05-02 23:58:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 23:58:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-05-02 23:58:13,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-05-02 23:58:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:13,288 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-05-02 23:58:13,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 states have internal predecessors, (14), 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 23:58:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-05-02 23:58:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:58:13,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:13,289 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:13,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:58:13,289 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1544831402, now seen corresponding path program 4 times [2021-05-02 23:58:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:13,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587293740] [2021-05-02 23:58:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:13,294 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_47 4294967296)) InVars {main_~x~0=v_main_~x~0_47} OutVars{main_~x~0=v_main_~x~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:58:13,297 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:13,298 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:13,312 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:13,340 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:13,362 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:13,609 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 23:58:14,033 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:14,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587293740] [2021-05-02 23:58:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587293740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:14,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:14,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:58:14,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134124474] [2021-05-02 23:58:14,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:58:14,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:58:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:58:14,035 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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 23:58:15,608 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-05-02 23:58:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:15,954 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-02 23:58:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:58:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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 19 [2021-05-02 23:58:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:15,955 INFO L225 Difference]: With dead ends: 33 [2021-05-02 23:58:15,956 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:58:15,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1889.5ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:58:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:58:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 23:58:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 23:58:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 23:58:15,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 19 [2021-05-02 23:58:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:15,960 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 23:58:15,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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 23:58:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 23:58:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:58:15,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:15,961 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:15,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:58:15,961 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797804, now seen corresponding path program 4 times [2021-05-02 23:58:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:15,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627149507] [2021-05-02 23:58:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:15,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_55 4294967296)) InVars {main_~x~0=v_main_~x~0_55} OutVars{main_~x~0=v_main_~x~0_55} AuxVars[] AssignedVars[] [2021-05-02 23:58:15,968 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:15,979 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:15,994 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:16,010 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:16,032 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:16,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:16,228 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 23:58:17,862 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:58:17,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627149507] [2021-05-02 23:58:17,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627149507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:17,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:17,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:58:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412905536] [2021-05-02 23:58:17,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:58:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:58:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:58:17,864 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 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 23:58:18,675 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-05-02 23:58:19,164 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 23:58:19,343 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2021-05-02 23:58:19,575 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2021-05-02 23:58:20,460 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:58:20,767 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2021-05-02 23:58:21,250 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2021-05-02 23:58:22,618 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 57 [2021-05-02 23:58:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:22,748 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-05-02 23:58:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:58:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 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 20 [2021-05-02 23:58:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:22,749 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:58:22,750 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:58:22,750 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4352.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:58:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:58:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 23:58:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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 23:58:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-05-02 23:58:22,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 20 [2021-05-02 23:58:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:22,755 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-05-02 23:58:22,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 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 23:58:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-05-02 23:58:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:58:22,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:22,756 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:22,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:58:22,756 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1715417834, now seen corresponding path program 5 times [2021-05-02 23:58:22,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:22,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335460063] [2021-05-02 23:58:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:22,766 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_65 4294967296)) InVars {main_~x~0=v_main_~x~0_65} OutVars{main_~x~0=v_main_~x~0_65} AuxVars[] AssignedVars[] [2021-05-02 23:58:22,768 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:22,769 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:22,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:22,813 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:22,842 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:23,193 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 23:58:23,566 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:23,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335460063] [2021-05-02 23:58:23,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335460063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:23,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:23,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:58:23,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115715152] [2021-05-02 23:58:23,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:58:23,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:58:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:58:23,568 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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 23:58:24,470 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-05-02 23:58:25,067 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-05-02 23:58:26,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:26,938 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 23:58:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:58:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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 21 [2021-05-02 23:58:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:26,939 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:58:26,939 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:58:26,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1784.8ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:58:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:58:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 23:58:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 23:58:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 23:58:26,944 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2021-05-02 23:58:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 23:58:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.0625) internal successors, (17), 15 states have internal predecessors, (17), 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 23:58:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 23:58:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:58:26,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:26,945 INFO L523 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:26,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:58:26,945 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1575109588, now seen corresponding path program 6 times [2021-05-02 23:58:26,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:26,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226351520] [2021-05-02 23:58:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:26,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_73 4294967296)) InVars {main_~x~0=v_main_~x~0_73} OutVars{main_~x~0=v_main_~x~0_73} AuxVars[] AssignedVars[] [2021-05-02 23:58:26,952 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:26,952 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:26,969 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:26,996 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:27,036 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:27,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:27,271 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 23:58:28,444 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:28,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226351520] [2021-05-02 23:58:28,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [226351520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:28,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:28,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:58:28,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988973240] [2021-05-02 23:58:28,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:58:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:28,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:58:28,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:58:28,446 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 23:58:29,746 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 23:58:30,968 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:58:31,520 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2021-05-02 23:58:33,423 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 47 [2021-05-02 23:58:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:33,734 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:58:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:58:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 22 [2021-05-02 23:58:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:33,735 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:58:33,735 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:58:33,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4302.8ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:58:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:58:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 23:58:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 23:58:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 23:58:33,740 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2021-05-02 23:58:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:33,740 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 23:58:33,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 23:58:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 23:58:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:58:33,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:33,740 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:33,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:58:33,740 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 38326348, now seen corresponding path program 5 times [2021-05-02 23:58:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:33,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043816694] [2021-05-02 23:58:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:33,748 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_83 4294967296)) InVars {main_~x~0=v_main_~x~0_83} OutVars{main_~x~0=v_main_~x~0_83} AuxVars[] AssignedVars[] [2021-05-02 23:58:33,750 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:33,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:33,777 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:33,794 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:33,817 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:34,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:34,040 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 23:58:35,218 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:58:36,050 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:58:37,543 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:58:37,544 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:37,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043816694] [2021-05-02 23:58:37,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043816694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:37,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:37,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:58:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732177745] [2021-05-02 23:58:37,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:58:37,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:58:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:58:37,546 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 23:58:38,881 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 23:58:39,759 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:58:41,037 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 23:58:42,327 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:58:42,898 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2021-05-02 23:58:43,709 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2021-05-02 23:58:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:43,921 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-05-02 23:58:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:58:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 22 [2021-05-02 23:58:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:43,922 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:58:43,922 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:58:43,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 8605.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:58:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:58:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-05-02 23:58:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 23:58:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 23:58:43,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2021-05-02 23:58:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:43,927 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 23:58:43,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 states have internal predecessors, (18), 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 23:58:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 23:58:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:58:43,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:43,928 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:43,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:58:43,928 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1222611862, now seen corresponding path program 7 times [2021-05-02 23:58:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:43,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602165490] [2021-05-02 23:58:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:43,932 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_95 4294967296)) InVars {main_~x~0=v_main_~x~0_95} OutVars{main_~x~0=v_main_~x~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:58:43,934 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:43,947 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:43,970 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:43,987 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:44,012 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:44,943 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 23:58:48,407 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:58:50,090 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:58:50,092 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602165490] [2021-05-02 23:58:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602165490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:50,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:50,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:58:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745878534] [2021-05-02 23:58:50,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:58:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:58:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:58:50,093 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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 23:58:51,078 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 23:58:51,653 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:58:52,571 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 23:58:54,451 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:58:55,044 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 46 [2021-05-02 23:58:57,041 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 51 [2021-05-02 23:58:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:57,467 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 23:58:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:58:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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 23 [2021-05-02 23:58:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:57,467 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:58:57,468 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:58:57,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 11404.8ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:58:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:58:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 23:58:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 23:58:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 23:58:57,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2021-05-02 23:58:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:57,473 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 23:58:57,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 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 23:58:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 23:58:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:58:57,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:57,474 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:57,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:58:57,474 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 894193068, now seen corresponding path program 6 times [2021-05-02 23:58:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:57,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388197738] [2021-05-02 23:58:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:57,484 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_107 4294967296)) InVars {main_~x~0=v_main_~x~0_107} OutVars{main_~x~0=v_main_~x~0_107} AuxVars[] AssignedVars[] [2021-05-02 23:58:57,488 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:58:57,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:57,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:58:57,538 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:58:57,562 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:58:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:57,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:57,729 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 23:58:58,980 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 23:59:00,082 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:59:01,506 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:59:03,725 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:59:07,386 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:07,387 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:59:07,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388197738] [2021-05-02 23:59:07,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [388197738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:59:07,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:59:07,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:59:07,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154739279] [2021-05-02 23:59:07,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:59:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:59:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:59:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:59:07,389 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 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 23:59:08,547 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-02 23:59:09,397 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:59:11,517 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-02 23:59:17,902 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:59:19,156 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2021-05-02 23:59:23,957 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 78 [2021-05-02 23:59:24,883 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 52 [2021-05-02 23:59:26,604 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2021-05-02 23:59:30,742 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 23:59:32,224 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2021-05-02 23:59:33,776 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-05-02 23:59:38,761 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 53 [2021-05-02 23:59:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:39,108 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-05-02 23:59:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:59:39,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 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 24 [2021-05-02 23:59:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:39,109 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:59:39,109 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:59:39,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 33882.7ms TimeCoverageRelationStatistics Valid=250, Invalid=1729, Unknown=1, NotChecked=0, Total=1980 [2021-05-02 23:59:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:59:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-05-02 23:59:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 23:59:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-05-02 23:59:39,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 24 [2021-05-02 23:59:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:59:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-05-02 23:59:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 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 23:59:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-05-02 23:59:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:59:39,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:59:39,116 INFO L523 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:59:39,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:59:39,116 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:59:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:59:39,116 INFO L82 PathProgramCache]: Analyzing trace with hash -787197354, now seen corresponding path program 8 times [2021-05-02 23:59:39,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:59:39,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596894869] [2021-05-02 23:59:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:59:39,121 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_121 4294967296)) InVars {main_~x~0=v_main_~x~0_121} OutVars{main_~x~0=v_main_~x~0_121} AuxVars[] AssignedVars[] [2021-05-02 23:59:39,122 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size [2021-05-02 23:59:39,123 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,149 WARN L240 tifierPushTermWalker]: treesize reduction 14, result has 65.0 percent of original size [2021-05-02 23:59:39,150 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,162 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,162 WARN L245 tifierPushTermWalker]: treesize reduction 14, result has 65.0 percent of original size 26 [2021-05-02 23:59:39,163 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,168 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,176 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:59:39,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-02 23:59:39,193 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,194 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,202 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,203 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,222 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-02 23:59:39,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-02 23:59:39,224 WARN L240 tifierPushTermWalker]: treesize reduction 14, result has 75.4 percent of original size [2021-05-02 23:59:39,248 WARN L245 tifierPushTermWalker]: treesize reduction 14, result has 75.4 percent of original size 43 [2021-05-02 23:59:39,249 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:59:39,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,268 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,274 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,283 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,283 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,298 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-02 23:59:39,299 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-02 23:59:39,299 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,301 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,302 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,310 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,311 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-02 23:59:39,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-02 23:59:39,331 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-05-02 23:59:39,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-02 23:59:39,366 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,367 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,374 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,374 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,375 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,379 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,380 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,388 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-05-02 23:59:39,404 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:59:39,404 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,406 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,407 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,413 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:39,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:39,414 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,429 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-02 23:59:39,429 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-05-02 23:59:39,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:39,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-05-02 23:59:39,463 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.1 percent of original size 70 [2021-05-02 23:59:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:39,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:40,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:41,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:42,800 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 1059 DAG size of output: 1059 [2021-05-02 23:59:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:12,600 WARN L205 SmtUtils]: Spent 9.49 m on a formula simplification. DAG size of input: 26273 DAG size of output: 26257 [2021-05-03 00:09:20,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:44,057 WARN L205 SmtUtils]: Spent 1.40 m on a formula simplification. DAG size of input: 11698 DAG size of output: 11584