/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/sum_by_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:16:29,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:16:29,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:16:29,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:16:29,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:16:29,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:16:29,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:16:29,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:16:29,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:16:29,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:16:29,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:16:29,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:16:29,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:16:29,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:16:29,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:16:29,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:16:29,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:16:29,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:16:29,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:16:29,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:16:29,451 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:16:29,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:16:29,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:16:29,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:16:29,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:16:29,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:16:29,849 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:16:29,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2021-05-03 00:16:29,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeabae20/3c6da41bb3d048039469bbe53db40195/FLAGe472985bb [2021-05-03 00:16:30,458 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:16:30,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2021-05-03 00:16:30,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeabae20/3c6da41bb3d048039469bbe53db40195/FLAGe472985bb [2021-05-03 00:16:30,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeabae20/3c6da41bb3d048039469bbe53db40195 [2021-05-03 00:16:30,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:16:30,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:16:30,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:16:30,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:16:30,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:16:30,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:16:30" (1/1) ... [2021-05-03 00:16:30,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2636cac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:30, skipping insertion in model container [2021-05-03 00:16:30,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:16:30" (1/1) ... [2021-05-03 00:16:30,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:16:30,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:16:31,150 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/sum_by_3.c[406,419] [2021-05-03 00:16:31,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:16:31,173 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:16:31,241 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/sum_by_3.c[406,419] [2021-05-03 00:16:31,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:16:31,277 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:16:31,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31 WrapperNode [2021-05-03 00:16:31,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:16:31,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:16:31,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:16:31,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:16:31,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (1/1) ... [2021-05-03 00:16:31,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:16:31,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:16:31,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:16:31,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:16:31,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (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 [2021-05-03 00:16:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:16:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:16:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:16:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:16:31,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:16:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:16:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:16:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:16:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:16:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:16:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:16:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:16:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-03 00:16:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:16:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:16:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:16:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:16:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:16:31,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:16:31,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:16:31,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:16:31,677 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 00:16:31,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:16:31 BoogieIcfgContainer [2021-05-03 00:16:31,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:16:31,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:16:31,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:16:31,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:16:31,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:16:30" (1/3) ... [2021-05-03 00:16:31,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6c73cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:16:31, skipping insertion in model container [2021-05-03 00:16:31,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:16:31" (2/3) ... [2021-05-03 00:16:31,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6c73cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:16:31, skipping insertion in model container [2021-05-03 00:16:31,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:16:31" (3/3) ... [2021-05-03 00:16:31,686 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_by_3.c [2021-05-03 00:16:31,691 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:16:31,695 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:16:31,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:16:31,738 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:16:31,738 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:16:31,738 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:16:31,738 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:16:31,738 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:16:31,738 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:16:31,738 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:16:31,739 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:16:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2021-05-03 00:16:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:16:31,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:31,758 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:31,759 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:31,764 INFO L82 PathProgramCache]: Analyzing trace with hash 963326671, now seen corresponding path program 1 times [2021-05-03 00:16:31,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:31,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254276248] [2021-05-03 00:16:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:31,876 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:16:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:32,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:32,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:32,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254276248] [2021-05-03 00:16:32,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254276248] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:32,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:32,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:16:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575834941] [2021-05-03 00:16:32,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:16:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:16:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:16:32,160 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-05-03 00:16:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:32,267 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-05-03 00:16:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:16:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 [2021-05-03 00:16:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:32,276 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:16:32,277 INFO L226 Difference]: Without dead ends: 17 [2021-05-03 00:16:32,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:16:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-03 00:16:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-03 00:16:32,335 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) [2021-05-03 00:16:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-03 00:16:32,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2021-05-03 00:16:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:32,340 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-03 00:16:32,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-03 00:16:32,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-03 00:16:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:16:32,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:32,342 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:32,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:16:32,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash 959632587, now seen corresponding path program 1 times [2021-05-03 00:16:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431695456] [2021-05-03 00:16:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:32,358 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:16:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:32,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:32,981 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:32,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431695456] [2021-05-03 00:16:32,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [431695456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:32,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:32,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:16:32,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447256342] [2021-05-03 00:16:32,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:16:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:16:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:16:32,984 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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) [2021-05-03 00:16:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:33,501 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-03 00:16:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:16:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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) Word has length 16 [2021-05-03 00:16:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:33,506 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:16:33,506 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:16:33,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:16:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:16:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-05-03 00:16:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2021-05-03 00:16:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-03 00:16:33,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-05-03 00:16:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:33,531 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-03 00:16:33,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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) [2021-05-03 00:16:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-03 00:16:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:16:33,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:33,533 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:33,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:16:33,534 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash -281665776, now seen corresponding path program 1 times [2021-05-03 00:16:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:33,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824830034] [2021-05-03 00:16:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:33,574 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~k~0_9 4294967296) (mod v_main_~n~0_12 4294967296)) InVars {main_~k~0=v_main_~k~0_9, main_~n~0=v_main_~n~0_12} OutVars{main_~k~0=v_main_~k~0_9, main_~n~0=v_main_~n~0_12} AuxVars[] AssignedVars[] [2021-05-03 00:16:33,583 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:33,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:33,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:33,654 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:33,680 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:34,397 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 38 [2021-05-03 00:16:34,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:34,611 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:34,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824830034] [2021-05-03 00:16:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824830034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:34,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:34,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:16:34,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674359012] [2021-05-03 00:16:34,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:16:34,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:16:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:16:34,619 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:35,102 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-03 00:16:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:16:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:16:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:35,104 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:16:35,104 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:16:35,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:16:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:16:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-05-03 00:16:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-05-03 00:16:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-03 00:16:35,117 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2021-05-03 00:16:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:35,118 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-03 00:16:35,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-03 00:16:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:16:35,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:35,119 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:35,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:16:35,120 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:35,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:35,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1916237745, now seen corresponding path program 1 times [2021-05-03 00:16:35,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:35,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504101488] [2021-05-03 00:16:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:35,127 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~j~0_9 4294967296) (mod v_main_~n~0_13 4294967296)) InVars {main_~j~0=v_main_~j~0_9, main_~n~0=v_main_~n~0_13} OutVars{main_~j~0=v_main_~j~0_9, main_~n~0=v_main_~n~0_13} AuxVars[] AssignedVars[] [2021-05-03 00:16:35,135 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:35,137 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:35,172 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:35,209 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:35,231 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:35,955 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2021-05-03 00:16:36,183 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 42 [2021-05-03 00:16:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:36,315 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:36,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504101488] [2021-05-03 00:16:36,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [504101488] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:36,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:36,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:16:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304012032] [2021-05-03 00:16:36,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:16:36,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:16:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:16:36,320 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:36,700 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-03 00:16:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:16:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:16:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:36,702 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:16:36,703 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 00:16:36,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:16:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 00:16:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 00:16:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-05-03 00:16:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-03 00:16:36,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-05-03 00:16:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:36,715 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-03 00:16:36,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-03 00:16:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:16:36,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:36,717 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:36,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:16:36,717 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:36,718 INFO L82 PathProgramCache]: Analyzing trace with hash 977611794, now seen corresponding path program 1 times [2021-05-03 00:16:36,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:36,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510323331] [2021-05-03 00:16:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:36,727 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_10 4294967296) (mod v_main_~n~0_14 4294967296)) InVars {main_~i~0=v_main_~i~0_10, main_~n~0=v_main_~n~0_14} OutVars{main_~i~0=v_main_~i~0_10, main_~n~0=v_main_~n~0_14} AuxVars[] AssignedVars[] [2021-05-03 00:16:36,734 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:36,736 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:36,767 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:36,797 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:36,830 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:37,301 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 00:16:37,514 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 00:16:37,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:37,733 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510323331] [2021-05-03 00:16:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510323331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:37,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:37,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:16:37,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967321145] [2021-05-03 00:16:37,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:16:37,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:16:37,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:16:37,736 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:38,274 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 00:16:38,400 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2021-05-03 00:16:38,586 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-05-03 00:16:38,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-05-03 00:16:38,969 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-05-03 00:16:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:39,163 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-05-03 00:16:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:16:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:16:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:39,164 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:16:39,165 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:16:39,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1801.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:16:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:16:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-05-03 00:16:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-03 00:16:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-05-03 00:16:39,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-05-03 00:16:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:39,174 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-05-03 00:16:39,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:16:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-05-03 00:16:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:16:39,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:39,175 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:39,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:16:39,176 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:39,180 INFO L82 PathProgramCache]: Analyzing trace with hash 373838384, now seen corresponding path program 1 times [2021-05-03 00:16:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:39,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115465710] [2021-05-03 00:16:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:39,188 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_14 4294967296) (mod v_main_~n~0_15 4294967296)) InVars {main_~i~0=v_main_~i~0_14, main_~n~0=v_main_~n~0_15} OutVars{main_~i~0=v_main_~i~0_14, main_~n~0=v_main_~n~0_15} AuxVars[] AssignedVars[] [2021-05-03 00:16:39,193 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:39,206 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:39,233 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:39,251 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:39,282 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:39,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:39,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:39,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115465710] [2021-05-03 00:16:39,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115465710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:39,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:39,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:16:39,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594879456] [2021-05-03 00:16:39,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:16:39,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:16:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:16:39,937 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) [2021-05-03 00:16:40,415 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-05-03 00:16:40,701 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-05-03 00:16:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:40,773 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-03 00:16:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:16:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) Word has length 19 [2021-05-03 00:16:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:40,774 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:16:40,774 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:16:40,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:16:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:16:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:16:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-05-03 00:16:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-03 00:16:40,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-05-03 00:16:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:40,782 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-03 00:16:40,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) [2021-05-03 00:16:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-03 00:16:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:16:40,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:40,784 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:40,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:16:40,784 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1633115954, now seen corresponding path program 2 times [2021-05-03 00:16:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:40,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386888172] [2021-05-03 00:16:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:40,793 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_19 4294967296) (mod v_main_~n~0_16 4294967296)) InVars {main_~i~0=v_main_~i~0_19, main_~n~0=v_main_~n~0_16} OutVars{main_~i~0=v_main_~i~0_19, main_~n~0=v_main_~n~0_16} AuxVars[] AssignedVars[] [2021-05-03 00:16:40,799 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:41,009 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-05-03 00:16:41,014 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:41,033 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:41,053 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:41,080 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:41,456 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-05-03 00:16:41,694 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-05-03 00:16:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:42,006 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:42,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386888172] [2021-05-03 00:16:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1386888172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:42,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:42,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:16:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584219134] [2021-05-03 00:16:42,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:16:42,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:16:42,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:16:42,009 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) [2021-05-03 00:16:43,026 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 60 [2021-05-03 00:16:43,218 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 59 [2021-05-03 00:16:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:43,393 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-03 00:16:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:16:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) Word has length 19 [2021-05-03 00:16:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:43,394 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:16:43,394 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:16:43,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1746.4ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:16:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:16:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-05-03 00:16:43,403 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) [2021-05-03 00:16:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-03 00:16:43,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2021-05-03 00:16:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:43,404 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-03 00:16:43,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 10 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) [2021-05-03 00:16:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-03 00:16:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:16:43,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:43,405 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:43,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:16:43,406 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1046856368, now seen corresponding path program 2 times [2021-05-03 00:16:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:43,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029454755] [2021-05-03 00:16:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:43,412 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_25 4294967296) (mod v_main_~n~0_17 4294967296)) InVars {main_~i~0=v_main_~i~0_25, main_~n~0=v_main_~n~0_17} OutVars{main_~i~0=v_main_~i~0_25, main_~n~0=v_main_~n~0_17} AuxVars[] AssignedVars[] [2021-05-03 00:16:43,415 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:43,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:43,435 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:43,460 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:43,485 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:43,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:43,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029454755] [2021-05-03 00:16:43,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029454755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:43,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:43,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:16:43,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253398062] [2021-05-03 00:16:43,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:16:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:16:43,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:16:43,710 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 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) [2021-05-03 00:16:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:44,416 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-03 00:16:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:16:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 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 [2021-05-03 00:16:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:44,417 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:16:44,417 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:16:44,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:16:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:16:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-03 00:16:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2021-05-03 00:16:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-03 00:16:44,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2021-05-03 00:16:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:44,425 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-03 00:16:44,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 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) [2021-05-03 00:16:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-03 00:16:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:16:44,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:44,426 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:44,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:16:44,426 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 212421202, now seen corresponding path program 3 times [2021-05-03 00:16:44,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:44,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268206803] [2021-05-03 00:16:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:44,432 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_32 4294967296) (mod v_main_~n~0_18 4294967296)) InVars {main_~i~0=v_main_~i~0_32, main_~n~0=v_main_~n~0_18} OutVars{main_~i~0=v_main_~i~0_32, main_~n~0=v_main_~n~0_18} AuxVars[] AssignedVars[] [2021-05-03 00:16:44,434 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:44,444 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:44,461 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:44,481 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:44,503 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:44,864 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-05-03 00:16:45,122 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2021-05-03 00:16:47,108 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 191 DAG size of output: 75 [2021-05-03 00:16:47,941 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 83 [2021-05-03 00:16:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:48,491 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:48,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268206803] [2021-05-03 00:16:48,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268206803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:48,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:48,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:16:48,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633571608] [2021-05-03 00:16:48,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:16:48,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:16:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:16:48,494 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-05-03 00:16:49,415 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-05-03 00:16:49,636 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-05-03 00:16:50,001 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2021-05-03 00:16:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:50,180 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-03 00:16:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:16:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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) Word has length 21 [2021-05-03 00:16:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:50,182 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:16:50,182 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:16:50,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4842.6ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:16:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:16:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-05-03 00:16:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-05-03 00:16:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-03 00:16:50,191 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2021-05-03 00:16:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:50,191 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-03 00:16:50,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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) [2021-05-03 00:16:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-03 00:16:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:16:50,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:50,192 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:50,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:16:50,192 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1662990609, now seen corresponding path program 1 times [2021-05-03 00:16:50,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:50,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428952275] [2021-05-03 00:16:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:50,198 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_40 4294967296) (mod v_main_~n~0_19 4294967296)) InVars {main_~i~0=v_main_~i~0_40, main_~n~0=v_main_~n~0_19} OutVars{main_~i~0=v_main_~i~0_40, main_~n~0=v_main_~n~0_19} AuxVars[] AssignedVars[] [2021-05-03 00:16:50,200 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:50,209 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:50,229 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:50,247 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:50,267 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:50,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:50,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428952275] [2021-05-03 00:16:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [428952275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:50,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:16:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525010216] [2021-05-03 00:16:50,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:16:50,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:16:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:16:50,976 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 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) [2021-05-03 00:16:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:51,809 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-03 00:16:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:16:51,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 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) Word has length 23 [2021-05-03 00:16:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:51,810 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:16:51,810 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:16:51,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1127.9ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:16:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:16:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:16:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-03 00:16:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-03 00:16:51,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2021-05-03 00:16:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:51,818 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-03 00:16:51,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 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) [2021-05-03 00:16:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-03 00:16:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:16:51,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:51,819 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:51,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:16:51,819 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 724364658, now seen corresponding path program 4 times [2021-05-03 00:16:51,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:51,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868661996] [2021-05-03 00:16:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:51,825 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_49 4294967296) (mod v_main_~n~0_20 4294967296)) InVars {main_~i~0=v_main_~i~0_49, main_~n~0=v_main_~n~0_20} OutVars{main_~i~0=v_main_~i~0_49, main_~n~0=v_main_~n~0_20} AuxVars[] AssignedVars[] [2021-05-03 00:16:51,827 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:51,828 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:51,850 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:51,877 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:51,902 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:52,259 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 00:16:52,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:52,871 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:52,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868661996] [2021-05-03 00:16:52,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [868661996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:52,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:52,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:16:52,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131915138] [2021-05-03 00:16:52,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:16:52,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:52,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:16:52,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:16:52,873 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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) [2021-05-03 00:16:54,031 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 58 [2021-05-03 00:16:54,219 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2021-05-03 00:16:54,359 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 60 [2021-05-03 00:16:54,550 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-05-03 00:16:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:54,695 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-03 00:16:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:16:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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) Word has length 23 [2021-05-03 00:16:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:54,697 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:16:54,697 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:16:54,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2294.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:16:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:16:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-05-03 00:16:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-05-03 00:16:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-03 00:16:54,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-05-03 00:16:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:54,706 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-03 00:16:54,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 15 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) [2021-05-03 00:16:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-03 00:16:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:16:54,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:54,707 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:54,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:16:54,708 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash -280587215, now seen corresponding path program 2 times [2021-05-03 00:16:54,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:54,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239661210] [2021-05-03 00:16:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:54,719 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_59 4294967296) (mod v_main_~n~0_21 4294967296)) InVars {main_~i~0=v_main_~i~0_59, main_~n~0=v_main_~n~0_21} OutVars{main_~i~0=v_main_~i~0_59, main_~n~0=v_main_~n~0_21} AuxVars[] AssignedVars[] [2021-05-03 00:16:54,722 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:54,737 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:54,771 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:54,798 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:54,823 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:55,189 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:16:55,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:55,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:55,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239661210] [2021-05-03 00:16:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239661210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:55,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:16:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912823083] [2021-05-03 00:16:55,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:16:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:16:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:16:55,679 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-05-03 00:16:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:56,635 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-05-03 00:16:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:16:56,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 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) Word has length 25 [2021-05-03 00:16:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:56,637 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:16:56,637 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:16:56,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1358.2ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:16:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:16:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:16:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-05-03 00:16:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-03 00:16:56,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-05-03 00:16:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:56,644 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-03 00:16:56,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-05-03 00:16:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-03 00:16:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:16:56,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:56,645 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:56,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:16:56,646 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1219213166, now seen corresponding path program 5 times [2021-05-03 00:16:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:56,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969587049] [2021-05-03 00:16:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:56,656 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_70 4294967296) (mod v_main_~n~0_22 4294967296)) InVars {main_~i~0=v_main_~i~0_70, main_~n~0=v_main_~n~0_22} OutVars{main_~i~0=v_main_~i~0_70, main_~n~0=v_main_~n~0_22} AuxVars[] AssignedVars[] [2021-05-03 00:16:56,658 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:56,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:56,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:56,707 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:16:56,726 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:57,102 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-03 00:16:57,311 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-05-03 00:16:57,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:16:57,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:57,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969587049] [2021-05-03 00:16:57,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969587049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:57,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:57,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:16:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628708073] [2021-05-03 00:16:57,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:16:57,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:16:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:16:57,857 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-05-03 00:16:59,426 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 52 [2021-05-03 00:16:59,767 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2021-05-03 00:16:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:59,918 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-03 00:16:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:16:59,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 states have internal predecessors, (21), 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) Word has length 25 [2021-05-03 00:16:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:59,920 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:16:59,920 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:16:59,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2658.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:16:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:16:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-05-03 00:16:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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) [2021-05-03 00:16:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-03 00:16:59,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2021-05-03 00:16:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:59,929 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-03 00:16:59,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-05-03 00:16:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-03 00:16:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:16:59,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:59,930 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:59,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:16:59,930 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 251897681, now seen corresponding path program 3 times [2021-05-03 00:16:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508223916] [2021-05-03 00:16:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:59,936 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_82 4294967296) (mod v_main_~n~0_23 4294967296)) InVars {main_~i~0=v_main_~i~0_82, main_~n~0=v_main_~n~0_23} OutVars{main_~i~0=v_main_~i~0_82, main_~n~0=v_main_~n~0_23} AuxVars[] AssignedVars[] [2021-05-03 00:16:59,938 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:16:59,948 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:59,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:16:59,996 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:00,019 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:00,350 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:17:00,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:00,894 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:00,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508223916] [2021-05-03 00:17:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [508223916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:00,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:00,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:17:00,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921099966] [2021-05-03 00:17:00,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:17:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:17:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:17:00,897 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-05-03 00:17:01,823 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-05-03 00:17:01,989 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 00:17:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:02,108 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-03 00:17:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:17:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 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) Word has length 27 [2021-05-03 00:17:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:02,109 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:17:02,109 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:17:02,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1540.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:17:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:17:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 00:17:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2021-05-03 00:17:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-03 00:17:02,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 27 [2021-05-03 00:17:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:02,116 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-03 00:17:02,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 16 states have internal predecessors, (23), 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) [2021-05-03 00:17:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-03 00:17:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:17:02,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:02,118 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:02,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:17:02,118 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash -686728270, now seen corresponding path program 6 times [2021-05-03 00:17:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:02,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920027767] [2021-05-03 00:17:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:02,130 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_95 4294967296) (mod v_main_~n~0_24 4294967296)) InVars {main_~i~0=v_main_~i~0_95, main_~n~0=v_main_~n~0_24} OutVars{main_~i~0=v_main_~i~0_95, main_~n~0=v_main_~n~0_24} AuxVars[] AssignedVars[] [2021-05-03 00:17:02,132 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:02,133 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:02,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:02,167 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:02,188 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:02,557 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 00:17:02,746 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 00:17:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:03,471 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:03,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920027767] [2021-05-03 00:17:03,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920027767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:03,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:03,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:17:03,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400262828] [2021-05-03 00:17:03,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:17:03,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:03,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:17:03,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:17:03,474 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-05-03 00:17:05,288 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2021-05-03 00:17:05,443 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 54 [2021-05-03 00:17:05,650 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2021-05-03 00:17:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:05,791 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-03 00:17:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:17:05,792 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 states have internal predecessors, (23), 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) Word has length 27 [2021-05-03 00:17:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:05,793 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:17:05,793 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:17:05,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 3034.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:17:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:17:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-03 00:17:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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) [2021-05-03 00:17:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-03 00:17:05,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2021-05-03 00:17:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:05,808 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-03 00:17:05,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-05-03 00:17:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-03 00:17:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:17:05,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:05,809 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:05,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:17:05,810 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash 868774513, now seen corresponding path program 4 times [2021-05-03 00:17:05,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:05,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221447644] [2021-05-03 00:17:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:05,814 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_109 4294967296) (mod v_main_~n~0_25 4294967296)) InVars {main_~i~0=v_main_~i~0_109, main_~n~0=v_main_~n~0_25} OutVars{main_~i~0=v_main_~i~0_109, main_~n~0=v_main_~n~0_25} AuxVars[] AssignedVars[] [2021-05-03 00:17:05,816 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:05,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:05,845 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:05,868 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:05,891 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:06,246 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:17:06,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:06,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:06,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221447644] [2021-05-03 00:17:06,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [221447644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:06,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:06,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:17:06,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833755059] [2021-05-03 00:17:06,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:17:06,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:17:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:17:06,951 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 18 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) [2021-05-03 00:17:08,214 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-05-03 00:17:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:08,368 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-03 00:17:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:17:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 18 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) Word has length 29 [2021-05-03 00:17:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:08,369 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:17:08,369 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:17:08,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1859.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:17:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:17:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 00:17:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-05-03 00:17:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-03 00:17:08,380 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 29 [2021-05-03 00:17:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:08,380 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-03 00:17:08,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 18 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) [2021-05-03 00:17:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-03 00:17:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:17:08,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:08,381 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:08,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:17:08,381 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -69851438, now seen corresponding path program 7 times [2021-05-03 00:17:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:08,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384111975] [2021-05-03 00:17:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:08,391 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_124 4294967296) (mod v_main_~n~0_26 4294967296)) InVars {main_~i~0=v_main_~i~0_124, main_~n~0=v_main_~n~0_26} OutVars{main_~i~0=v_main_~i~0_124, main_~n~0=v_main_~n~0_26} AuxVars[] AssignedVars[] [2021-05-03 00:17:08,393 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:08,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:08,417 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:08,441 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:08,464 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:10,257 WARN L205 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 75 [2021-05-03 00:17:11,067 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 83 [2021-05-03 00:17:11,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:12,110 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:12,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384111975] [2021-05-03 00:17:12,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [384111975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:12,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:12,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:17:12,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002833186] [2021-05-03 00:17:12,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:17:12,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:17:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:17:12,112 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 24 states, 22 states have (on average 1.1363636363636365) 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) [2021-05-03 00:17:13,957 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-05-03 00:17:14,295 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 54 [2021-05-03 00:17:14,794 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2021-05-03 00:17:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:15,056 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-03 00:17:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:17:15,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.1363636363636365) 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) Word has length 29 [2021-05-03 00:17:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:15,057 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:17:15,057 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:17:15,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 5477.1ms TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:17:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:17:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-05-03 00:17:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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) [2021-05-03 00:17:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-03 00:17:15,066 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2021-05-03 00:17:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:15,067 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-03 00:17:15,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 1.1363636363636365) 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) [2021-05-03 00:17:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-03 00:17:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:17:15,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:15,067 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:15,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:17:15,068 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash 981923217, now seen corresponding path program 5 times [2021-05-03 00:17:15,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:15,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992484004] [2021-05-03 00:17:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:15,078 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_140 4294967296) (mod v_main_~n~0_27 4294967296)) InVars {main_~i~0=v_main_~i~0_140, main_~n~0=v_main_~n~0_27} OutVars{main_~i~0=v_main_~i~0_140, main_~n~0=v_main_~n~0_27} AuxVars[] AssignedVars[] [2021-05-03 00:17:15,082 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:15,083 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:15,108 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:15,139 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:15,175 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:15,623 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:17:15,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:16,515 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:16,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992484004] [2021-05-03 00:17:16,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992484004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:16,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:16,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:17:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103965581] [2021-05-03 00:17:16,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:17:16,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:17:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:17:16,517 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 20 states have internal predecessors, (27), 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) [2021-05-03 00:17:18,038 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 00:17:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:18,207 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-03 00:17:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:17:18,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 20 states have internal predecessors, (27), 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) Word has length 31 [2021-05-03 00:17:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:18,208 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:17:18,208 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:17:18,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2326.9ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:17:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:17:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 00:17:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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) [2021-05-03 00:17:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-03 00:17:18,216 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2021-05-03 00:17:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:18,216 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-03 00:17:18,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 20 states have internal predecessors, (27), 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) [2021-05-03 00:17:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-03 00:17:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:17:18,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:18,217 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:18,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:17:18,217 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 43297266, now seen corresponding path program 8 times [2021-05-03 00:17:18,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:18,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688707593] [2021-05-03 00:17:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:18,233 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_157 4294967296) (mod v_main_~n~0_28 4294967296)) InVars {main_~i~0=v_main_~i~0_157, main_~n~0=v_main_~n~0_28} OutVars{main_~i~0=v_main_~i~0_157, main_~n~0=v_main_~n~0_28} AuxVars[] AssignedVars[] [2021-05-03 00:17:18,235 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:18,237 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:18,259 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:18,285 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:18,308 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:18,747 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-05-03 00:17:19,138 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 45 [2021-05-03 00:17:19,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:20,335 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:20,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688707593] [2021-05-03 00:17:20,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [688707593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:20,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:20,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:17:20,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184509719] [2021-05-03 00:17:20,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:17:20,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:17:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:17:20,337 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-05-03 00:17:21,967 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 00:17:22,128 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2021-05-03 00:17:22,324 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-05-03 00:17:22,562 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 56 [2021-05-03 00:17:22,805 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2021-05-03 00:17:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:22,950 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-05-03 00:17:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:17:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 22 states have internal predecessors, (27), 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) Word has length 31 [2021-05-03 00:17:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:22,952 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:17:22,952 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:17:22,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3836.3ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:17:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:17:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-05-03 00:17:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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) [2021-05-03 00:17:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-03 00:17:22,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-05-03 00:17:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:22,962 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-03 00:17:22,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-05-03 00:17:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-03 00:17:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:17:22,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:22,963 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:22,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:17:22,963 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1951321935, now seen corresponding path program 6 times [2021-05-03 00:17:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:22,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164772216] [2021-05-03 00:17:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:22,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_175 4294967296) (mod v_main_~n~0_29 4294967296)) InVars {main_~i~0=v_main_~i~0_175, main_~n~0=v_main_~n~0_29} OutVars{main_~i~0=v_main_~i~0_175, main_~n~0=v_main_~n~0_29} AuxVars[] AssignedVars[] [2021-05-03 00:17:22,972 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:22,984 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:23,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:23,017 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:23,044 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:23,389 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:17:23,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:24,412 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:24,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164772216] [2021-05-03 00:17:24,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [164772216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:24,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:24,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:17:24,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543257713] [2021-05-03 00:17:24,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:17:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:17:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:17:24,415 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 22 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) [2021-05-03 00:17:26,273 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-05-03 00:17:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:26,477 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-03 00:17:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:17:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 22 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) Word has length 33 [2021-05-03 00:17:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:26,479 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:17:26,479 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:17:26,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2568.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:17:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:17:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-03 00:17:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-05-03 00:17:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-03 00:17:26,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 33 [2021-05-03 00:17:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:26,488 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-03 00:17:26,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 22 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) [2021-05-03 00:17:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-03 00:17:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:17:26,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:26,488 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:26,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:17:26,489 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1405019410, now seen corresponding path program 9 times [2021-05-03 00:17:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:26,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163708368] [2021-05-03 00:17:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:26,496 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_194 4294967296) (mod v_main_~n~0_30 4294967296)) InVars {main_~i~0=v_main_~i~0_194, main_~n~0=v_main_~n~0_30} OutVars{main_~i~0=v_main_~i~0_194, main_~n~0=v_main_~n~0_30} AuxVars[] AssignedVars[] [2021-05-03 00:17:26,498 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:26,500 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:26,519 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:26,545 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:26,575 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:26,843 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-05-03 00:17:26,994 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 00:17:27,223 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 52 [2021-05-03 00:17:27,438 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-05-03 00:17:28,290 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 67 [2021-05-03 00:17:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:29,941 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163708368] [2021-05-03 00:17:29,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163708368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:29,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:29,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:17:29,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913620006] [2021-05-03 00:17:29,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:17:29,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:29,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:17:29,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:17:29,943 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) 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) [2021-05-03 00:17:33,047 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2021-05-03 00:17:33,271 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 66 [2021-05-03 00:17:33,504 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 54 [2021-05-03 00:17:33,837 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 71 [2021-05-03 00:17:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:34,024 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-05-03 00:17:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:17:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) 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) Word has length 33 [2021-05-03 00:17:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:34,026 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:17:34,026 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:17:34,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6342.0ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:17:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:17:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-05-03 00:17:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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) [2021-05-03 00:17:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-03 00:17:34,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2021-05-03 00:17:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:34,034 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-03 00:17:34,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.0740740740740742) 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) [2021-05-03 00:17:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-03 00:17:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:17:34,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:34,035 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:34,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:17:34,035 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:34,035 INFO L82 PathProgramCache]: Analyzing trace with hash 993600465, now seen corresponding path program 7 times [2021-05-03 00:17:34,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:34,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587298351] [2021-05-03 00:17:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:34,049 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_214 4294967296) (mod v_main_~n~0_31 4294967296)) InVars {main_~i~0=v_main_~i~0_214, main_~n~0=v_main_~n~0_31} OutVars{main_~i~0=v_main_~i~0_214, main_~n~0=v_main_~n~0_31} AuxVars[] AssignedVars[] [2021-05-03 00:17:34,051 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:34,060 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:34,077 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:34,095 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:34,125 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:34,556 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:17:34,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:35,733 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587298351] [2021-05-03 00:17:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [587298351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:35,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:35,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:17:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79031569] [2021-05-03 00:17:35,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:17:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:17:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:17:35,735 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-05-03 00:17:38,221 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-05-03 00:17:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:38,463 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-03 00:17:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:17:38,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 24 states have internal predecessors, (31), 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) Word has length 35 [2021-05-03 00:17:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:38,466 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:17:38,466 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:17:38,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3243.7ms TimeCoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:17:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:17:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 00:17:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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) [2021-05-03 00:17:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-03 00:17:38,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2021-05-03 00:17:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:38,474 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-03 00:17:38,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-05-03 00:17:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-03 00:17:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:17:38,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:38,475 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:38,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:17:38,475 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash 54974514, now seen corresponding path program 10 times [2021-05-03 00:17:38,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:38,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44154099] [2021-05-03 00:17:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:38,483 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_235 4294967296) (mod v_main_~n~0_32 4294967296)) InVars {main_~i~0=v_main_~i~0_235, main_~n~0=v_main_~n~0_32} OutVars{main_~i~0=v_main_~i~0_235, main_~n~0=v_main_~n~0_32} AuxVars[] AssignedVars[] [2021-05-03 00:17:38,486 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:38,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:38,515 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:38,553 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:38,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:39,096 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-05-03 00:17:39,400 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 41 [2021-05-03 00:17:39,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:40,860 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:40,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44154099] [2021-05-03 00:17:40,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [44154099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:40,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:40,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:17:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905828824] [2021-05-03 00:17:40,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:17:40,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:17:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:17:40,862 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-05-03 00:17:43,423 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2021-05-03 00:17:43,861 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 54 [2021-05-03 00:17:44,073 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2021-05-03 00:17:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:44,236 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-05-03 00:17:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:17:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 26 states have internal predecessors, (31), 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) Word has length 35 [2021-05-03 00:17:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:44,237 INFO L225 Difference]: With dead ends: 62 [2021-05-03 00:17:44,238 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:17:44,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 4602.8ms TimeCoverageRelationStatistics Valid=370, Invalid=3170, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:17:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:17:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-05-03 00:17:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2021-05-03 00:17:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-03 00:17:44,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2021-05-03 00:17:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:44,248 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-03 00:17:44,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-05-03 00:17:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-03 00:17:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:17:44,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:44,249 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:44,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:17:44,249 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash 680578801, now seen corresponding path program 8 times [2021-05-03 00:17:44,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:44,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085347443] [2021-05-03 00:17:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:44,256 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_257 4294967296) (mod v_main_~n~0_33 4294967296)) InVars {main_~i~0=v_main_~i~0_257, main_~n~0=v_main_~n~0_33} OutVars{main_~i~0=v_main_~i~0_257, main_~n~0=v_main_~n~0_33} AuxVars[] AssignedVars[] [2021-05-03 00:17:44,259 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:44,261 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:44,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:44,312 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:44,340 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:44,778 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:17:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:46,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:46,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085347443] [2021-05-03 00:17:46,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085347443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:46,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:46,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:17:46,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887206520] [2021-05-03 00:17:46,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:17:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:17:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:17:46,435 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 26 states have internal predecessors, (33), 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) [2021-05-03 00:17:49,147 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-05-03 00:17:49,419 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 00:17:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:49,741 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-03 00:17:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:17:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 26 states have internal predecessors, (33), 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) Word has length 37 [2021-05-03 00:17:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:49,743 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:17:49,743 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:17:49,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4064.9ms TimeCoverageRelationStatistics Valid=258, Invalid=2712, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:17:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:17:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 00:17:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2021-05-03 00:17:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-05-03 00:17:49,751 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 37 [2021-05-03 00:17:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:49,752 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-05-03 00:17:49,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 26 states have internal predecessors, (33), 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) [2021-05-03 00:17:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-05-03 00:17:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:17:49,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:49,752 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:49,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:17:49,753 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash -258047150, now seen corresponding path program 11 times [2021-05-03 00:17:49,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:49,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909600150] [2021-05-03 00:17:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:49,761 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_280 4294967296) (mod v_main_~n~0_34 4294967296)) InVars {main_~i~0=v_main_~i~0_280, main_~n~0=v_main_~n~0_34} OutVars{main_~i~0=v_main_~i~0_280, main_~n~0=v_main_~n~0_34} AuxVars[] AssignedVars[] [2021-05-03 00:17:49,764 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:17:49,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:49,788 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:17:49,835 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:17:49,883 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:50,197 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-05-03 00:17:50,480 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2021-05-03 00:17:52,583 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 191 DAG size of output: 75 [2021-05-03 00:17:53,863 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 165 DAG size of output: 83 [2021-05-03 00:17:54,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:17:56,515 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909600150] [2021-05-03 00:17:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909600150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:56,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:56,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:17:56,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264369322] [2021-05-03 00:17:56,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:17:56,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:56,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:17:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:17:56,517 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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) [2021-05-03 00:17:59,949 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-05-03 00:18:00,455 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-05-03 00:18:00,734 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-05-03 00:18:01,105 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 61 [2021-05-03 00:18:01,668 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2021-05-03 00:18:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:01,928 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-05-03 00:18:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:18:01,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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) Word has length 37 [2021-05-03 00:18:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:01,930 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:18:01,930 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:18:01,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 10135.9ms TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:18:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:18:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-05-03 00:18:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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) [2021-05-03 00:18:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-03 00:18:01,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2021-05-03 00:18:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:01,938 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-03 00:18:01,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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) [2021-05-03 00:18:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-03 00:18:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:18:01,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:01,939 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:01,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:18:01,939 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash 514470417, now seen corresponding path program 9 times [2021-05-03 00:18:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:01,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029874026] [2021-05-03 00:18:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:01,947 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_304 4294967296) (mod v_main_~n~0_35 4294967296)) InVars {main_~i~0=v_main_~i~0_304, main_~n~0=v_main_~n~0_35} OutVars{main_~i~0=v_main_~i~0_304, main_~n~0=v_main_~n~0_35} AuxVars[] AssignedVars[] [2021-05-03 00:18:01,950 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:01,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:01,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:02,015 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:02,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:02,380 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 00:18:02,658 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:18:02,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:04,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:04,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029874026] [2021-05-03 00:18:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029874026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:04,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:04,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:18:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093767152] [2021-05-03 00:18:04,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:18:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:18:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:18:04,875 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-05-03 00:18:08,508 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-05-03 00:18:08,812 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-05-03 00:18:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:09,193 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-03 00:18:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:18:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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) Word has length 39 [2021-05-03 00:18:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:09,196 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:18:09,196 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:18:09,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 5344.8ms TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:18:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:18:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 00:18:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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) [2021-05-03 00:18:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-03 00:18:09,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 39 [2021-05-03 00:18:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:09,204 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-03 00:18:09,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-05-03 00:18:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-03 00:18:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:18:09,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:09,205 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:09,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:18:09,205 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash -424155534, now seen corresponding path program 12 times [2021-05-03 00:18:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:09,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515488477] [2021-05-03 00:18:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:09,219 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_329 4294967296) (mod v_main_~n~0_36 4294967296)) InVars {main_~i~0=v_main_~i~0_329, main_~n~0=v_main_~n~0_36} OutVars{main_~i~0=v_main_~i~0_329, main_~n~0=v_main_~n~0_36} AuxVars[] AssignedVars[] [2021-05-03 00:18:09,222 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:09,224 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:09,252 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:09,290 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:09,335 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:09,965 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 00:18:10,258 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 00:18:10,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:12,907 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515488477] [2021-05-03 00:18:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [515488477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:12,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:18:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661225970] [2021-05-03 00:18:12,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:18:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:18:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:18:12,909 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 states have internal predecessors, (35), 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) [2021-05-03 00:18:13,239 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:18:13,461 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-03 00:18:13,675 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:13,907 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:14,128 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:14,354 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:14,553 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:14,780 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:14,984 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:15,206 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:15,406 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:15,631 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:15,836 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:16,073 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:16,285 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:16,512 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:16,711 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:16,943 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:17,145 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:17,376 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:17,583 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:17,859 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:18,119 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:18,342 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:18,570 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-05-03 00:18:18,877 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 00:18:19,213 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 58 [2021-05-03 00:18:19,551 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-05-03 00:18:19,889 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 60 [2021-05-03 00:18:20,309 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-05-03 00:18:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:20,565 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-05-03 00:18:20,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:18:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 states have internal predecessors, (35), 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) Word has length 39 [2021-05-03 00:18:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:20,567 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:18:20,567 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:18:20,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 9229.2ms TimeCoverageRelationStatistics Valid=482, Invalid=4210, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:18:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:18:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-05-03 00:18:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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) [2021-05-03 00:18:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-03 00:18:20,577 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2021-05-03 00:18:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:20,577 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-03 00:18:20,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 31 states have internal predecessors, (35), 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) [2021-05-03 00:18:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-03 00:18:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:18:20,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:20,578 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:20,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:18:20,578 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash -201896655, now seen corresponding path program 10 times [2021-05-03 00:18:20,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:20,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874754364] [2021-05-03 00:18:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:20,585 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_355 4294967296) (mod v_main_~n~0_37 4294967296)) InVars {main_~i~0=v_main_~i~0_355, main_~n~0=v_main_~n~0_37} OutVars{main_~i~0=v_main_~i~0_355, main_~n~0=v_main_~n~0_37} AuxVars[] AssignedVars[] [2021-05-03 00:18:20,588 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:20,589 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:20,615 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:20,656 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:20,701 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:20,937 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 00:18:21,118 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 00:18:21,460 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:18:21,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:24,228 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:24,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874754364] [2021-05-03 00:18:24,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874754364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:24,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:24,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:18:24,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890119708] [2021-05-03 00:18:24,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:18:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:18:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:18:24,230 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 30 states have internal predecessors, (37), 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) [2021-05-03 00:18:28,386 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-05-03 00:18:28,707 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2021-05-03 00:18:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:29,086 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-03 00:18:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:18:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.15625) internal successors, (37), 30 states have internal predecessors, (37), 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) Word has length 41 [2021-05-03 00:18:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:29,088 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:18:29,088 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:18:29,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 6331.8ms TimeCoverageRelationStatistics Valid=298, Invalid=3608, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:18:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:18:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:18:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 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) [2021-05-03 00:18:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-03 00:18:29,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 41 [2021-05-03 00:18:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:29,098 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-03 00:18:29,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.15625) internal successors, (37), 30 states have internal predecessors, (37), 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) [2021-05-03 00:18:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-03 00:18:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:18:29,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:29,099 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:29,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:18:29,099 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1140522606, now seen corresponding path program 13 times [2021-05-03 00:18:29,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:29,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631672419] [2021-05-03 00:18:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:29,104 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_382 4294967296) (mod v_main_~n~0_38 4294967296)) InVars {main_~i~0=v_main_~i~0_382, main_~n~0=v_main_~n~0_38} OutVars{main_~i~0=v_main_~i~0_382, main_~n~0=v_main_~n~0_38} AuxVars[] AssignedVars[] [2021-05-03 00:18:29,107 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:29,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:29,145 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:29,168 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:29,209 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:29,948 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 00:18:30,273 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2021-05-03 00:18:30,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:33,094 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:33,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631672419] [2021-05-03 00:18:33,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631672419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:33,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:33,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:18:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725526039] [2021-05-03 00:18:33,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:18:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:18:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:18:33,095 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 states have internal predecessors, (37), 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) [2021-05-03 00:18:33,571 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:18:33,797 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:34,015 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:34,228 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:34,444 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:34,656 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:34,857 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:35,066 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:35,284 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:35,504 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:35,719 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:35,939 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:36,156 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:36,376 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:36,593 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:36,807 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:37,422 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:37,638 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:37,918 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:38,196 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:38,419 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:38,643 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:38,866 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:39,089 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:39,306 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 00:18:39,604 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 00:18:39,932 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2021-05-03 00:18:40,248 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-05-03 00:18:40,589 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 60 [2021-05-03 00:18:40,994 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-05-03 00:18:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:41,314 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-05-03 00:18:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:18:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 states have internal predecessors, (37), 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) Word has length 41 [2021-05-03 00:18:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:41,317 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:18:41,317 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:18:41,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 9769.1ms TimeCoverageRelationStatistics Valid=512, Invalid=4744, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:18:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:18:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-05-03 00:18:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 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) [2021-05-03 00:18:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-05-03 00:18:41,325 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2021-05-03 00:18:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:41,326 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-05-03 00:18:41,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 33 states have internal predecessors, (37), 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) [2021-05-03 00:18:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-05-03 00:18:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:18:41,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:41,326 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:41,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:18:41,327 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:41,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1435885487, now seen corresponding path program 11 times [2021-05-03 00:18:41,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:41,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685067574] [2021-05-03 00:18:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:41,333 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_410 4294967296) (mod v_main_~n~0_39 4294967296)) InVars {main_~i~0=v_main_~i~0_410, main_~n~0=v_main_~n~0_39} OutVars{main_~i~0=v_main_~i~0_410, main_~n~0=v_main_~n~0_39} AuxVars[] AssignedVars[] [2021-05-03 00:18:41,337 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:41,351 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:41,375 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:41,405 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:41,455 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:41,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 00:18:41,847 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 00:18:42,211 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:18:42,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:45,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685067574] [2021-05-03 00:18:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685067574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:45,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:45,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:18:45,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839747706] [2021-05-03 00:18:45,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:18:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:45,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:18:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:18:45,510 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-05-03 00:18:51,415 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2021-05-03 00:18:51,847 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2021-05-03 00:18:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:52,388 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-05-03 00:18:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:18:52,389 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 32 states have internal predecessors, (39), 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) Word has length 43 [2021-05-03 00:18:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:52,390 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:18:52,390 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:18:52,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 7842.0ms TimeCoverageRelationStatistics Valid=317, Invalid=4105, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:18:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:18:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:18:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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) [2021-05-03 00:18:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-03 00:18:52,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 43 [2021-05-03 00:18:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:52,399 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-03 00:18:52,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-05-03 00:18:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-03 00:18:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:18:52,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:52,400 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:52,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:18:52,400 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1920455858, now seen corresponding path program 14 times [2021-05-03 00:18:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574274000] [2021-05-03 00:18:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:52,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_439 4294967296) (mod v_main_~n~0_40 4294967296)) InVars {main_~i~0=v_main_~i~0_439, main_~n~0=v_main_~n~0_40} OutVars{main_~i~0=v_main_~i~0_439, main_~n~0=v_main_~n~0_40} AuxVars[] AssignedVars[] [2021-05-03 00:18:52,411 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:18:52,413 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:52,455 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:18:52,505 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:18:52,571 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:52,859 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 00:18:53,377 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-03 00:18:53,752 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-05-03 00:18:53,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:18:57,727 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574274000] [2021-05-03 00:18:57,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574274000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:57,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:57,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:18:57,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526089938] [2021-05-03 00:18:57,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:18:57,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:18:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:18:57,729 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-05-03 00:18:58,319 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:18:58,614 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-03 00:18:58,889 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:59,220 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:18:59,586 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:18:59,888 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:00,160 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:00,433 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:00,703 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:00,988 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:01,268 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:01,544 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:01,835 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:02,120 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:02,419 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:02,724 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:03,042 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:03,346 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:03,685 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:03,994 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:04,288 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:04,584 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:04,874 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:05,152 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:05,433 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:05,736 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:06,043 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:06,380 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:06,657 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 00:19:07,096 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 00:19:07,518 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 58 [2021-05-03 00:19:08,035 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 52 [2021-05-03 00:19:08,469 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2021-05-03 00:19:09,149 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2021-05-03 00:19:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:09,611 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-03 00:19:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:19:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 states have internal predecessors, (39), 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) Word has length 43 [2021-05-03 00:19:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:09,615 INFO L225 Difference]: With dead ends: 70 [2021-05-03 00:19:09,615 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:19:09,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 13256.4ms TimeCoverageRelationStatistics Valid=542, Invalid=5310, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:19:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:19:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-03 00:19:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2021-05-03 00:19:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-05-03 00:19:09,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2021-05-03 00:19:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:09,625 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-05-03 00:19:09,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-05-03 00:19:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-05-03 00:19:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:19:09,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:09,625 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:09,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:19:09,625 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1888179343, now seen corresponding path program 12 times [2021-05-03 00:19:09,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:09,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45686547] [2021-05-03 00:19:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:09,634 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_469 4294967296) (mod v_main_~n~0_41 4294967296)) InVars {main_~i~0=v_main_~i~0_469, main_~n~0=v_main_~n~0_41} OutVars{main_~i~0=v_main_~i~0_469, main_~n~0=v_main_~n~0_41} AuxVars[] AssignedVars[] [2021-05-03 00:19:09,637 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:19:09,639 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:09,682 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:19:09,747 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:19:09,813 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:10,117 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 00:19:10,309 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 00:19:10,671 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-05-03 00:19:10,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:19:10,942 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 00:19:15,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:15,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45686547] [2021-05-03 00:19:15,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [45686547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:15,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:15,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:19:15,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501568881] [2021-05-03 00:19:15,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:19:15,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:19:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:19:15,263 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-05-03 00:19:15,979 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:19:22,775 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-05-03 00:19:23,286 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-05-03 00:19:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:23,907 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-03 00:19:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:19:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 34 states have internal predecessors, (41), 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) Word has length 45 [2021-05-03 00:19:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:23,910 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:19:23,911 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:19:23,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 10190.1ms TimeCoverageRelationStatistics Valid=337, Invalid=4633, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:19:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:19:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-03 00:19:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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) [2021-05-03 00:19:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-03 00:19:23,918 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 45 [2021-05-03 00:19:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:23,918 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-03 00:19:23,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 34 states have internal predecessors, (41), 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) [2021-05-03 00:19:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-03 00:19:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:19:23,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:23,919 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:23,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:19:23,919 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1468162002, now seen corresponding path program 15 times [2021-05-03 00:19:23,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955933079] [2021-05-03 00:19:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:23,926 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_500 4294967296) (mod v_main_~n~0_42 4294967296)) InVars {main_~i~0=v_main_~i~0_500, main_~n~0=v_main_~n~0_42} OutVars{main_~i~0=v_main_~i~0_500, main_~n~0=v_main_~n~0_42} AuxVars[] AssignedVars[] [2021-05-03 00:19:23,929 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:19:23,945 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:23,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:19:24,024 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:19:24,077 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:24,353 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 00:19:24,932 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 00:19:25,315 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-05-03 00:19:25,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:19:30,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:30,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955933079] [2021-05-03 00:19:30,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1955933079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:30,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:30,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:19:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086283254] [2021-05-03 00:19:30,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:19:30,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:30,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:19:30,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:19:30,091 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-05-03 00:19:30,964 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:19:31,306 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-03 00:19:31,678 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:32,044 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:32,405 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:32,770 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:33,137 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:33,509 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:33,902 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:34,295 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:34,700 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:35,074 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:35,463 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:35,858 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:36,216 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:36,596 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:36,987 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:37,353 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:37,770 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:38,178 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:38,635 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:39,090 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:39,507 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:39,904 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:40,296 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:40,658 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:19:40,998 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:41,376 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:41,754 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:42,117 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:19:42,457 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-05-03 00:19:42,994 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-05-03 00:19:43,485 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 58 [2021-05-03 00:19:44,029 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2021-05-03 00:19:44,633 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 60 [2021-05-03 00:19:45,437 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-05-03 00:19:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:46,295 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-05-03 00:19:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:19:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 states have internal predecessors, (41), 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) Word has length 45 [2021-05-03 00:19:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:46,300 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:19:46,300 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:19:46,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 16523.8ms TimeCoverageRelationStatistics Valid=572, Invalid=5908, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:19:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:19:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-03 00:19:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 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) [2021-05-03 00:19:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-05-03 00:19:46,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2021-05-03 00:19:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:46,310 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-05-03 00:19:46,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-05-03 00:19:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-05-03 00:19:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:19:46,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:46,310 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:46,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:19:46,311 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1544089233, now seen corresponding path program 13 times [2021-05-03 00:19:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:46,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382839225] [2021-05-03 00:19:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:46,320 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_532 4294967296) (mod v_main_~n~0_43 4294967296)) InVars {main_~i~0=v_main_~i~0_532, main_~n~0=v_main_~n~0_43} OutVars{main_~i~0=v_main_~i~0_532, main_~n~0=v_main_~n~0_43} AuxVars[] AssignedVars[] [2021-05-03 00:19:46,323 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:19:46,325 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:46,373 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:19:46,444 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:19:46,521 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:46,864 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 00:19:47,228 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 00:19:47,765 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:19:47,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:19:48,103 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 00:19:53,283 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382839225] [2021-05-03 00:19:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382839225] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:53,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:53,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:19:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523144857] [2021-05-03 00:19:53,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:19:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:19:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:19:53,285 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-05-03 00:19:54,127 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:19:58,624 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:20:03,378 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-05-03 00:20:04,065 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 00:20:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:05,000 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-03 00:20:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:20:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 36 states have internal predecessors, (43), 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) Word has length 47 [2021-05-03 00:20:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:05,004 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:20:05,004 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:20:05,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 13007.7ms TimeCoverageRelationStatistics Valid=358, Invalid=5192, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:20:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:20:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-03 00:20:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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) [2021-05-03 00:20:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-03 00:20:05,013 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 47 [2021-05-03 00:20:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:05,013 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-03 00:20:05,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-05-03 00:20:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-03 00:20:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:20:05,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:05,014 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:05,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:20:05,014 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash 605463282, now seen corresponding path program 16 times [2021-05-03 00:20:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:05,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285686580] [2021-05-03 00:20:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:05,023 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_565 4294967296) (mod v_main_~n~0_44 4294967296)) InVars {main_~i~0=v_main_~i~0_565, main_~n~0=v_main_~n~0_44} OutVars{main_~i~0=v_main_~i~0_565, main_~n~0=v_main_~n~0_44} AuxVars[] AssignedVars[] [2021-05-03 00:20:05,027 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:20:05,051 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:05,105 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:20:05,157 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:20:05,245 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:05,908 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-05-03 00:20:06,587 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 48 [2021-05-03 00:20:06,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:20:07,150 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 00:20:13,332 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:13,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285686580] [2021-05-03 00:20:13,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [285686580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:13,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:13,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:20:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645657664] [2021-05-03 00:20:13,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:20:13,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:20:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1655, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:20:13,334 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-05-03 00:20:14,402 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:20:14,862 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-03 00:20:15,331 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:15,781 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:16,262 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:16,745 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:17,234 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:17,711 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:18,216 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:18,747 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:19,245 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:19,762 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:20,189 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:20,659 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:21,172 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:21,655 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:22,097 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:22,518 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:22,779 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:23,034 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:23,579 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:23,880 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:24,225 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:24,549 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:24,849 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:25,169 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:25,490 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:25,835 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:26,160 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:26,465 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:26,729 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:27,025 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-05-03 00:20:27,784 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 58 [2021-05-03 00:20:28,188 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-05-03 00:20:28,680 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2021-05-03 00:20:29,268 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2021-05-03 00:20:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:29,802 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-05-03 00:20:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:20:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 states have internal predecessors, (43), 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) Word has length 47 [2021-05-03 00:20:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:29,805 INFO L225 Difference]: With dead ends: 74 [2021-05-03 00:20:29,805 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:20:29,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 18395.3ms TimeCoverageRelationStatistics Valid=532, Invalid=6440, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 00:20:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:20:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-03 00:20:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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) [2021-05-03 00:20:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-05-03 00:20:29,818 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2021-05-03 00:20:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:29,818 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-05-03 00:20:29,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-05-03 00:20:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-05-03 00:20:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:20:29,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:29,819 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:29,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:20:29,819 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1419307441, now seen corresponding path program 14 times [2021-05-03 00:20:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:29,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881989356] [2021-05-03 00:20:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:29,829 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_599 4294967296) (mod v_main_~n~0_45 4294967296)) InVars {main_~i~0=v_main_~i~0_599, main_~n~0=v_main_~n~0_45} OutVars{main_~i~0=v_main_~i~0_599, main_~n~0=v_main_~n~0_45} AuxVars[] AssignedVars[] [2021-05-03 00:20:29,833 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:20:29,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:29,885 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:20:29,934 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:20:29,990 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:30,418 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 00:20:30,795 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2021-05-03 00:20:30,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:20:34,851 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:34,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881989356] [2021-05-03 00:20:34,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881989356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:34,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:34,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:20:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11960146] [2021-05-03 00:20:34,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:20:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:20:34,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:20:34,853 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 38 states have internal predecessors, (45), 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) [2021-05-03 00:20:35,490 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:20:42,465 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-05-03 00:20:42,950 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-05-03 00:20:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:43,634 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-03 00:20:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:20:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.125) internal successors, (45), 38 states have internal predecessors, (45), 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) Word has length 49 [2021-05-03 00:20:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:43,638 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:20:43,638 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:20:43,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 9625.8ms TimeCoverageRelationStatistics Valid=378, Invalid=5784, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:20:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:20:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-03 00:20:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 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) [2021-05-03 00:20:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-03 00:20:43,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 49 [2021-05-03 00:20:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:43,646 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-03 00:20:43,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.125) internal successors, (45), 38 states have internal predecessors, (45), 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) [2021-05-03 00:20:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-03 00:20:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:20:43,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:43,647 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:43,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:20:43,647 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash 480681490, now seen corresponding path program 17 times [2021-05-03 00:20:43,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:43,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801992058] [2021-05-03 00:20:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:43,666 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_634 4294967296) (mod v_main_~n~0_46 4294967296)) InVars {main_~i~0=v_main_~i~0_634, main_~n~0=v_main_~n~0_46} OutVars{main_~i~0=v_main_~i~0_634, main_~n~0=v_main_~n~0_46} AuxVars[] AssignedVars[] [2021-05-03 00:20:43,670 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:20:43,688 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:43,725 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:20:43,761 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:20:43,825 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:44,135 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 00:20:44,291 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 00:20:44,869 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-03 00:20:45,319 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-05-03 00:20:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:20:45,647 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 00:20:50,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:50,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801992058] [2021-05-03 00:20:50,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801992058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:50,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:50,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:20:50,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008213759] [2021-05-03 00:20:50,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:20:50,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:50,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:20:50,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:20:50,251 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 states have internal predecessors, (45), 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) [2021-05-03 00:20:51,017 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 00:20:51,297 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:51,569 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:51,912 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:52,281 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:52,636 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:53,003 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:53,272 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:53,547 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:53,823 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:54,121 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:54,452 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:54,719 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:55,054 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:55,373 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:55,699 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:56,078 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:56,444 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:56,817 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:57,202 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:57,544 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:57,955 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:58,306 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:58,639 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:58,955 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:59,282 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:20:59,601 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:20:59,930 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:21:00,295 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:21:00,622 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:21:00,940 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:21:01,250 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:21:01,538 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 00:21:01,825 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 00:21:02,130 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-05-03 00:21:02,589 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 00:21:03,051 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 58 [2021-05-03 00:21:03,520 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 52 [2021-05-03 00:21:03,938 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 60 [2021-05-03 00:21:04,595 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 54 [2021-05-03 00:21:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:21:05,235 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-05-03 00:21:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:21:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 states have internal predecessors, (45), 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) Word has length 49 [2021-05-03 00:21:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:21:05,238 INFO L225 Difference]: With dead ends: 76 [2021-05-03 00:21:05,238 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:21:05,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 16059.0ms TimeCoverageRelationStatistics Valid=632, Invalid=7200, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:21:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:21:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-05-03 00:21:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 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) [2021-05-03 00:21:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-05-03 00:21:05,248 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-05-03 00:21:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:21:05,248 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-05-03 00:21:05,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 41 states have internal predecessors, (45), 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) [2021-05-03 00:21:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-05-03 00:21:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:21:05,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:21:05,249 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:21:05,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:21:05,249 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:21:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:21:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1763089617, now seen corresponding path program 15 times [2021-05-03 00:21:05,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:21:05,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120883341] [2021-05-03 00:21:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:21:05,256 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_670 4294967296) (mod v_main_~n~0_47 4294967296)) InVars {main_~i~0=v_main_~i~0_670, main_~n~0=v_main_~n~0_47} OutVars{main_~i~0=v_main_~i~0_670, main_~n~0=v_main_~n~0_47} AuxVars[] AssignedVars[] [2021-05-03 00:21:05,258 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size [2021-05-03 00:21:05,273 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:21:05,307 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-03 00:21:05,343 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.6 percent of original size 60 [2021-05-03 00:21:05,399 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:21:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:05,585 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2021-05-03 00:21:05,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:21:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:21:05,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:21:06,231 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 00:21:06,722 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 00:21:07,555 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 00:21:09,022 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:21:12,218 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 00:21:16,054 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 00:21:23,728 WARN L205 SmtUtils]: Spent 5.29 s on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 00:21:32,652 WARN L205 SmtUtils]: Spent 6.56 s on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:21:49,989 WARN L205 SmtUtils]: Spent 15.79 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:22:15,337 WARN L205 SmtUtils]: Spent 23.12 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:22:41,740 WARN L205 SmtUtils]: Spent 23.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:23:24,745 WARN L205 SmtUtils]: Spent 36.86 s on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:24:18,895 WARN L205 SmtUtils]: Spent 48.17 s on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 00:25:04,928 WARN L205 SmtUtils]: Spent 36.49 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 00:25:06,940 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0))) is different from false [2021-05-03 00:25:08,957 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0))) is different from false [2021-05-03 00:26:19,283 WARN L205 SmtUtils]: Spent 57.92 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 00:26:21,294 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0))) is different from false [2021-05-03 00:27:43,848 WARN L205 SmtUtils]: Spent 1.23 m on a formula simplification that was a NOOP. DAG size: 97 [2021-05-03 00:27:45,864 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0))) is different from false [2021-05-03 00:27:47,893 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:27:49,913 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:42,816 WARN L205 SmtUtils]: Spent 1.68 m on a formula simplification that was a NOOP. DAG size: 113 [2021-05-03 00:29:44,830 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:46,847 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:48,868 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967266) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:50,889 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967266) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967265) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:52,911 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967264) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967266) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967265) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:54,931 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967264) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967263) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967266) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967265) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:56,949 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (< (mod (+ c_main_~i~0 4294967278) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967276) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967275) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967285) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967262) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967287) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967280) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967271) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967286) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967264) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967284) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967263) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967294) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967293) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967282) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967292) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967288) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967295) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967268) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967273) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967279) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967266) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967265) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967274) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967291) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967289) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967283) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967277) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967272) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967267) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967270) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967281) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967269) 4294967296) .cse0) (< (mod (+ c_main_~i~0 4294967290) 4294967296) .cse0))) is different from false [2021-05-03 00:29:56,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120883341] [2021-05-03 00:29:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120883341] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:56,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:56,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:29:56,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124906866] [2021-05-03 00:29:56,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:29:56,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:29:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=397, Unknown=19, NotChecked=780, Total=1482 [2021-05-03 00:29:56,968 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 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) [2021-05-03 00:30:08,747 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:30:15,015 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 00:30:20,607 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 00:30:27,161 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 58