/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/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:15:08,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:15:08,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:15:08,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:15:08,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:15:08,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:15:08,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:15:08,886 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 00:15:08,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:15:08,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:15:08,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:15:08,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:15:08,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:15:08,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:15:08,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:15:08,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:15:08,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:15:08,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:15:08,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:15:08,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:15:08,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:15:08,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:15:08,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:15:08,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:15:08,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:15:08,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:15:08,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:15:08,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:15:08,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:15:08,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:15:08,905 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:15:08,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:15:09,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:15:09,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:15:09,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:15:09,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:15:09,263 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:15:09,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2021-05-03 00:15:09,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e2500e9/c1361056678d4a5497d06dd1583bd5cf/FLAG524dfdfb5 [2021-05-03 00:15:09,643 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:15:09,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2021-05-03 00:15:09,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e2500e9/c1361056678d4a5497d06dd1583bd5cf/FLAG524dfdfb5 [2021-05-03 00:15:10,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e2500e9/c1361056678d4a5497d06dd1583bd5cf [2021-05-03 00:15:10,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:15:10,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:15:10,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:15:10,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:15:10,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:15:10,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d75e5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10, skipping insertion in model container [2021-05-03 00:15:10,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:15:10,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:15:10,232 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/nested3-1.c[321,334] [2021-05-03 00:15:10,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:15:10,254 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:15:10,290 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/nested3-1.c[321,334] [2021-05-03 00:15:10,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:15:10,344 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:15:10,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10 WrapperNode [2021-05-03 00:15:10,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:15:10,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:15:10,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:15:10,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:15:10,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (1/1) ... [2021-05-03 00:15:10,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:15:10,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:15:10,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:15:10,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:15:10,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (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 00:15:10,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:15:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:15:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:15:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:15:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:15:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:15:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:15:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:15:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:15:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:15:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:15:10,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:15:10,763 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 00:15:10,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:15:10 BoogieIcfgContainer [2021-05-03 00:15:10,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:15:10,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:15:10,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:15:10,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:15:10,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:15:10" (1/3) ... [2021-05-03 00:15:10,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26da53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:15:10, skipping insertion in model container [2021-05-03 00:15:10,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:15:10" (2/3) ... [2021-05-03 00:15:10,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26da53ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:15:10, skipping insertion in model container [2021-05-03 00:15:10,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:15:10" (3/3) ... [2021-05-03 00:15:10,787 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-05-03 00:15:10,792 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:15:10,801 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:15:10,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:15:10,858 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:15:10,859 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:15:10,859 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:15:10,859 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:15:10,859 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:15:10,859 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:15:10,859 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:15:10,859 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:15:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-03 00:15:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:15:10,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:10,883 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:10,884 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2021-05-03 00:15:10,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:10,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315309625] [2021-05-03 00:15:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:10,951 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,174 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 00:15:11,176 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:11,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315309625] [2021-05-03 00:15:11,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315309625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:11,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:11,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:15:11,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121791589] [2021-05-03 00:15:11,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:15:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:15:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:15:11,197 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:11,294 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2021-05-03 00:15:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:15:11,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:15:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:11,304 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:15:11,304 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:15:11,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:15:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:15:11,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:15:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-03 00:15:11,341 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-05-03 00:15:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:11,341 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-03 00:15:11,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-03 00:15:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:15:11,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:11,342 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:11,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:15:11,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2021-05-03 00:15:11,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:11,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779682504] [2021-05-03 00:15:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:11,346 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,468 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 00:15:11,468 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:11,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779682504] [2021-05-03 00:15:11,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [779682504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:11,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:11,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:11,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806934209] [2021-05-03 00:15:11,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:11,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:11,470 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:11,591 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-03 00:15:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:15:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:11,595 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:15:11,595 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:15:11,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:15:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-05-03 00:15:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-03 00:15:11,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-05-03 00:15:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:11,617 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-03 00:15:11,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-03 00:15:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:15:11,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:11,618 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:11,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:15:11,619 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2021-05-03 00:15:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:11,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860304455] [2021-05-03 00:15:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:11,629 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,694 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 00:15:11,694 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:11,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860304455] [2021-05-03 00:15:11,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [860304455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:11,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:11,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:11,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624643046] [2021-05-03 00:15:11,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:11,696 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:11,761 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-03 00:15:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:15:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:11,762 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:15:11,762 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:15:11,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:15:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-03 00:15:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-03 00:15:11,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-05-03 00:15:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:11,769 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-03 00:15:11,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-03 00:15:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:15:11,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:11,770 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:11,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:15:11,770 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:11,771 INFO L82 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2021-05-03 00:15:11,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:11,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147142529] [2021-05-03 00:15:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:11,773 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:15:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:11,822 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 00:15:11,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147142529] [2021-05-03 00:15:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147142529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:15:11,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030116916] [2021-05-03 00:15:11,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:15:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:15:11,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:15:11,824 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:11,884 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-03 00:15:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:15:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-03 00:15:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:11,885 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:15:11,885 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:15:11,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:15:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:15:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-03 00:15:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-05-03 00:15:11,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-05-03 00:15:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:11,892 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-05-03 00:15:11,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-05-03 00:15:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:15:11,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:11,893 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:11,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:15:11,893 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2021-05-03 00:15:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:11,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86292534] [2021-05-03 00:15:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:11,921 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_9 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_9} OutVars{main_~z~0=v_main_~z~0_9} AuxVars[] AssignedVars[] [2021-05-03 00:15:11,929 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:11,932 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:11,981 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:12,004 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:12,026 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:12,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:12,212 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 00:15:12,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:12,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86292534] [2021-05-03 00:15:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [86292534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:12,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:12,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:15:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213317380] [2021-05-03 00:15:12,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:15:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:15:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:15:12,259 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:12,428 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-03 00:15:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:15:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:15:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:12,431 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:15:12,431 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:15:12,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:15:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:15:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-03 00:15:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-05-03 00:15:12,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2021-05-03 00:15:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:12,438 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-05-03 00:15:12,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-05-03 00:15:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 00:15:12,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:12,439 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:12,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:15:12,439 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1415616702, now seen corresponding path program 2 times [2021-05-03 00:15:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:12,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703672327] [2021-05-03 00:15:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:12,444 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_13 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_13} OutVars{main_~z~0=v_main_~z~0_13} AuxVars[] AssignedVars[] [2021-05-03 00:15:12,448 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:12,459 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:12,473 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:12,486 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:12,504 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:12,654 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 00:15:12,739 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703672327] [2021-05-03 00:15:12,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [703672327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:12,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:12,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:15:12,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831964443] [2021-05-03 00:15:12,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:15:12,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:12,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:15:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:15:12,741 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:12,902 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-05-03 00:15:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:15:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-03 00:15:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:12,903 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:15:12,903 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:15:12,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:15:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:15:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-03 00:15:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-03 00:15:12,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2021-05-03 00:15:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:12,911 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-03 00:15:12,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-03 00:15:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:15:12,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:12,912 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:12,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:15:12,912 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -908142238, now seen corresponding path program 3 times [2021-05-03 00:15:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:12,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100624587] [2021-05-03 00:15:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:12,936 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_18 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_18} OutVars{main_~z~0=v_main_~z~0_18} AuxVars[] AssignedVars[] [2021-05-03 00:15:12,940 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:12,942 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:12,972 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:12,996 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:13,015 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:13,169 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 00:15:13,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:13,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100624587] [2021-05-03 00:15:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [100624587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:13,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:13,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:15:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997488304] [2021-05-03 00:15:13,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:15:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:15:13,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:15:13,231 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:13,447 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-05-03 00:15:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:15:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:15:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:13,449 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:15:13,449 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:15:13,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:15:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:15:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-03 00:15:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-03 00:15:13,463 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2021-05-03 00:15:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:13,463 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-03 00:15:13,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-03 00:15:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:15:13,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:13,464 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:13,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:15:13,465 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 4 times [2021-05-03 00:15:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:13,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507193614] [2021-05-03 00:15:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:13,470 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_24 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_24} OutVars{main_~z~0=v_main_~z~0_24} AuxVars[] AssignedVars[] [2021-05-03 00:15:13,473 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:13,475 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:13,491 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:13,535 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:13,558 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:13,705 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 00:15:13,777 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:13,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507193614] [2021-05-03 00:15:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [507193614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:15:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799278921] [2021-05-03 00:15:13,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:15:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:13,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:15:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:15:13,779 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:14,010 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-05-03 00:15:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:15:14,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:15:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:14,011 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:15:14,011 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:15:14,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:15:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:15:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-03 00:15:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-03 00:15:14,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2021-05-03 00:15:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:14,017 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-03 00:15:14,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-03 00:15:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:15:14,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:14,018 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:14,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:15:14,018 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash -4647582, now seen corresponding path program 5 times [2021-05-03 00:15:14,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:14,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876337736] [2021-05-03 00:15:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:14,023 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_31 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_31} OutVars{main_~z~0=v_main_~z~0_31} AuxVars[] AssignedVars[] [2021-05-03 00:15:14,041 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:14,053 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:14,084 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:14,100 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:14,132 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:14,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:14,223 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 00:15:14,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:14,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876337736] [2021-05-03 00:15:14,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [876337736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:14,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:14,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:15:14,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566627564] [2021-05-03 00:15:14,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:15:14,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:15:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:15:14,356 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:14,632 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-05-03 00:15:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:15:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-03 00:15:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:14,635 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:15:14,635 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:15:14,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:15:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:15:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-03 00:15:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-05-03 00:15:14,647 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-05-03 00:15:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:14,648 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-05-03 00:15:14,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-05-03 00:15:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:15:14,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:14,649 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:14,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:15:14,649 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash -117772478, now seen corresponding path program 6 times [2021-05-03 00:15:14,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:14,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670402208] [2021-05-03 00:15:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:14,655 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_39 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_39} OutVars{main_~z~0=v_main_~z~0_39} AuxVars[] AssignedVars[] [2021-05-03 00:15:14,659 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:14,660 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:14,681 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:14,704 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:14,726 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:14,865 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 00:15:14,953 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670402208] [2021-05-03 00:15:14,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [670402208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:14,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:14,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:15:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220777665] [2021-05-03 00:15:14,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:15:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:15:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:15:14,955 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:15,309 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-05-03 00:15:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:15:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:15:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:15,311 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:15:15,311 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:15:15,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:15:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:15:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-03 00:15:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-05-03 00:15:15,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2021-05-03 00:15:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:15,323 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-05-03 00:15:15,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.25) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-05-03 00:15:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:15:15,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:15,324 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:15,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:15:15,325 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash 670323042, now seen corresponding path program 7 times [2021-05-03 00:15:15,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:15,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118573952] [2021-05-03 00:15:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:15,332 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_48 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_48} OutVars{main_~z~0=v_main_~z~0_48} AuxVars[] AssignedVars[] [2021-05-03 00:15:15,338 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:15,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:15,373 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:15,391 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:15,409 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:15,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:15,543 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 00:15:15,668 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118573952] [2021-05-03 00:15:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118573952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:15,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:15,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:15:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069824671] [2021-05-03 00:15:15,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:15:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:15:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:15:15,670 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:16,079 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-05-03 00:15:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:15:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:15:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:16,083 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:15:16,083 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:15:16,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:15:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:15:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-03 00:15:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-05-03 00:15:16,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2021-05-03 00:15:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:16,118 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-05-03 00:15:16,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-05-03 00:15:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:15:16,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:16,119 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:16,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:15:16,120 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash -668519614, now seen corresponding path program 8 times [2021-05-03 00:15:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:16,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535154969] [2021-05-03 00:15:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:16,126 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_58 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_58} OutVars{main_~z~0=v_main_~z~0_58} AuxVars[] AssignedVars[] [2021-05-03 00:15:16,129 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:16,141 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:16,193 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:16,225 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:16,251 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:16,452 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 00:15:16,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:16,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535154969] [2021-05-03 00:15:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535154969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:16,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:16,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:15:16,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561295935] [2021-05-03 00:15:16,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:15:16,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:15:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:15:16,580 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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 00:15:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:17,066 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-03 00:15:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:15:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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 00:15:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:17,068 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:15:17,068 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:15:17,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:15:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:15:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-03 00:15:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-05-03 00:15:17,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2021-05-03 00:15:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:17,078 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-05-03 00:15:17,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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 00:15:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-05-03 00:15:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:15:17,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:17,080 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:17,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:15:17,081 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 777031010, now seen corresponding path program 9 times [2021-05-03 00:15:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151709935] [2021-05-03 00:15:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:17,087 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_69 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_69} OutVars{main_~z~0=v_main_~z~0_69} AuxVars[] AssignedVars[] [2021-05-03 00:15:17,090 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:17,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:17,126 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:17,148 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:17,198 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:17,350 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 00:15:17,501 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:17,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151709935] [2021-05-03 00:15:17,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151709935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:17,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:17,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:15:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881280987] [2021-05-03 00:15:17,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:15:17,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:17,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:15:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:15:17,505 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:17,927 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-05-03 00:15:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:15:17,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:15:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:17,929 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:15:17,929 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:15:17,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:15:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:15:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-03 00:15:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-03 00:15:17,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2021-05-03 00:15:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:17,937 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-03 00:15:17,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-03 00:15:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:15:17,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:17,940 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:17,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:15:17,941 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1655539902, now seen corresponding path program 10 times [2021-05-03 00:15:17,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:17,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733983840] [2021-05-03 00:15:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:17,945 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_81 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_81} OutVars{main_~z~0=v_main_~z~0_81} AuxVars[] AssignedVars[] [2021-05-03 00:15:17,948 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:17,949 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:17,978 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:17,999 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:18,031 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:18,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:18,163 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 00:15:18,327 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:18,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733983840] [2021-05-03 00:15:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [733983840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:18,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:18,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:15:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24265036] [2021-05-03 00:15:18,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:15:18,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:15:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:15:18,330 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:18,847 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-03 00:15:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:15:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-03 00:15:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:18,848 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:15:18,848 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:15:18,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:15:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:15:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-03 00:15:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-03 00:15:18,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2021-05-03 00:15:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:18,858 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-03 00:15:18,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-03 00:15:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:15:18,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:18,862 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:18,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:15:18,862 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 244173154, now seen corresponding path program 11 times [2021-05-03 00:15:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:18,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835700721] [2021-05-03 00:15:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:18,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_94 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_94} OutVars{main_~z~0=v_main_~z~0_94} AuxVars[] AssignedVars[] [2021-05-03 00:15:18,870 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:18,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:18,898 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:18,926 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:18,957 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:19,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:19,081 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 00:15:19,280 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:19,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835700721] [2021-05-03 00:15:19,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835700721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:19,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:19,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:15:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150819072] [2021-05-03 00:15:19,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:15:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:15:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:15:19,283 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:19,891 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-03 00:15:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:15:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:15:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:19,892 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:15:19,892 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:15:19,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:15:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:15:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-03 00:15:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-03 00:15:19,901 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2021-05-03 00:15:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:19,902 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-03 00:15:19,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:15:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-03 00:15:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:15:19,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:19,903 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:19,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:15:19,903 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -994264254, now seen corresponding path program 12 times [2021-05-03 00:15:19,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:19,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976754390] [2021-05-03 00:15:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:19,907 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_108 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_108} OutVars{main_~z~0=v_main_~z~0_108} AuxVars[] AssignedVars[] [2021-05-03 00:15:19,909 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:19,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:19,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:19,951 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:19,971 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:20,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:20,102 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 00:15:20,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:20,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976754390] [2021-05-03 00:15:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [976754390] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:15:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788090875] [2021-05-03 00:15:20,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:15:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:15:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:15:20,321 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 00:15:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:20,984 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-05-03 00:15:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:15:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 25 [2021-05-03 00:15:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:20,985 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:15:20,985 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:15:20,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 667.2ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:15:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:15:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-03 00:15:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-03 00:15:20,992 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2021-05-03 00:15:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:20,992 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-03 00:15:20,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 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 00:15:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-03 00:15:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:15:20,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:20,993 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:20,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:15:20,993 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -731118238, now seen corresponding path program 13 times [2021-05-03 00:15:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:20,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750177986] [2021-05-03 00:15:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:20,998 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_123 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_123} OutVars{main_~z~0=v_main_~z~0_123} AuxVars[] AssignedVars[] [2021-05-03 00:15:21,000 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:21,001 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:21,024 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:21,048 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:21,065 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:21,176 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 00:15:21,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:21,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750177986] [2021-05-03 00:15:21,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [750177986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:21,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:21,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:15:21,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134268059] [2021-05-03 00:15:21,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:15:21,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:15:21,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:15:21,433 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 00:15:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:22,134 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-05-03 00:15:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:15:22,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 26 [2021-05-03 00:15:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:22,136 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:15:22,136 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:15:22,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 711.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:15:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:15:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-03 00:15:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-03 00:15:22,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2021-05-03 00:15:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:22,144 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-03 00:15:22,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 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 00:15:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-03 00:15:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:15:22,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:22,146 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:22,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:15:22,146 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1163526334, now seen corresponding path program 14 times [2021-05-03 00:15:22,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:22,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538765071] [2021-05-03 00:15:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:22,150 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_139 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_139} OutVars{main_~z~0=v_main_~z~0_139} AuxVars[] AssignedVars[] [2021-05-03 00:15:22,154 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:22,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:22,184 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:22,198 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:22,219 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:22,328 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 00:15:22,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:22,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538765071] [2021-05-03 00:15:22,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [538765071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:22,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:22,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:15:22,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853462270] [2021-05-03 00:15:22,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:15:22,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:15:22,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:15:22,588 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 00:15:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:23,343 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-05-03 00:15:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:15:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 27 [2021-05-03 00:15:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:23,344 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:15:23,344 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:15:23,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:15:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:15:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-03 00:15:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-03 00:15:23,349 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2021-05-03 00:15:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:23,349 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-03 00:15:23,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 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 00:15:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-03 00:15:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:15:23,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:23,350 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:23,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:15:23,350 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1683275422, now seen corresponding path program 15 times [2021-05-03 00:15:23,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:23,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425108222] [2021-05-03 00:15:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:23,355 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_156 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_156} OutVars{main_~z~0=v_main_~z~0_156} AuxVars[] AssignedVars[] [2021-05-03 00:15:23,357 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:23,360 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:23,374 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:23,394 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:23,415 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:23,536 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 00:15:23,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:23,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425108222] [2021-05-03 00:15:23,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [425108222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:23,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:23,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:15:23,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036881172] [2021-05-03 00:15:23,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:15:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:15:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:15:23,823 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 00:15:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:24,669 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-05-03 00:15:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:15:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 28 [2021-05-03 00:15:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:24,671 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:15:24,671 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:15:24,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:15:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:15:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-03 00:15:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-03 00:15:24,676 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2021-05-03 00:15:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:24,676 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-03 00:15:24,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 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 00:15:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-03 00:15:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:15:24,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:24,677 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:24,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:15:24,677 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash -615627966, now seen corresponding path program 16 times [2021-05-03 00:15:24,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:24,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780207715] [2021-05-03 00:15:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:24,683 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_174 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_174} OutVars{main_~z~0=v_main_~z~0_174} AuxVars[] AssignedVars[] [2021-05-03 00:15:24,685 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:24,695 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:24,713 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:24,736 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:24,757 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:24,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:24,875 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 00:15:25,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:25,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780207715] [2021-05-03 00:15:25,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780207715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:25,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:25,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:15:25,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598013880] [2021-05-03 00:15:25,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:15:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:15:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:15:25,179 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 00:15:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:26,061 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-05-03 00:15:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:15:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 29 [2021-05-03 00:15:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:26,062 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:15:26,062 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:15:26,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 868.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:15:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:15:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-03 00:15:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-05-03 00:15:26,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2021-05-03 00:15:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:26,067 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-05-03 00:15:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 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 00:15:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-05-03 00:15:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 00:15:26,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:26,068 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:26,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:15:26,068 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1878295198, now seen corresponding path program 17 times [2021-05-03 00:15:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036738351] [2021-05-03 00:15:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:26,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_193 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_193} OutVars{main_~z~0=v_main_~z~0_193} AuxVars[] AssignedVars[] [2021-05-03 00:15:26,088 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:26,098 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:26,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:26,126 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:26,145 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:26,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:26,268 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 00:15:26,583 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:26,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036738351] [2021-05-03 00:15:26,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036738351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:26,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:26,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:15:26,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978617173] [2021-05-03 00:15:26,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:15:26,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:15:26,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:15:26,585 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 00:15:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:27,447 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-05-03 00:15:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:15:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 30 [2021-05-03 00:15:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:27,448 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:15:27,448 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:15:27,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:15:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:15:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-03 00:15:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-05-03 00:15:27,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2021-05-03 00:15:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:27,454 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-05-03 00:15:27,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 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 00:15:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-05-03 00:15:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:15:27,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:27,455 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:27,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:15:27,455 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1928693570, now seen corresponding path program 18 times [2021-05-03 00:15:27,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:27,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119027062] [2021-05-03 00:15:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:27,479 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_213 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_213} OutVars{main_~z~0=v_main_~z~0_213} AuxVars[] AssignedVars[] [2021-05-03 00:15:27,481 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:27,482 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:27,496 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:27,522 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:27,543 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:27,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:27,649 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 00:15:27,976 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119027062] [2021-05-03 00:15:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119027062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:27,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:27,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:15:27,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626066588] [2021-05-03 00:15:27,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:15:27,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:27,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:15:27,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:15:27,978 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 00:15:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:28,963 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-05-03 00:15:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:15:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 31 [2021-05-03 00:15:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:28,964 INFO L225 Difference]: With dead ends: 75 [2021-05-03 00:15:28,964 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:15:28,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 947.0ms TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:15:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:15:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-03 00:15:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-03 00:15:28,970 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 31 [2021-05-03 00:15:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:28,970 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-03 00:15:28,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 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 00:15:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-03 00:15:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 00:15:28,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:28,971 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:28,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:15:28,971 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash -313738910, now seen corresponding path program 19 times [2021-05-03 00:15:28,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:28,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825689143] [2021-05-03 00:15:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:28,985 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_234 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_234} OutVars{main_~z~0=v_main_~z~0_234} AuxVars[] AssignedVars[] [2021-05-03 00:15:28,987 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:28,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:29,014 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:29,030 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:29,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:29,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:29,158 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 00:15:29,531 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825689143] [2021-05-03 00:15:29,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825689143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:29,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:29,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:15:29,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250296236] [2021-05-03 00:15:29,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 00:15:29,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 00:15:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:15:29,533 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 00:15:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:30,590 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-05-03 00:15:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:15:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 32 [2021-05-03 00:15:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:30,591 INFO L225 Difference]: With dead ends: 77 [2021-05-03 00:15:30,591 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:15:30,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1052.1ms TimeCoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:15:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:15:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-03 00:15:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-03 00:15:30,597 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2021-05-03 00:15:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:30,597 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-03 00:15:30,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 00:15:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-03 00:15:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:15:30,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:30,597 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:30,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:15:30,598 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1109669054, now seen corresponding path program 20 times [2021-05-03 00:15:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015422940] [2021-05-03 00:15:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:30,606 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_256 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_256} OutVars{main_~z~0=v_main_~z~0_256} AuxVars[] AssignedVars[] [2021-05-03 00:15:30,608 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:30,623 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:30,637 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:30,652 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:30,671 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:30,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:30,791 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 00:15:31,179 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:31,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015422940] [2021-05-03 00:15:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015422940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:31,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:31,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:15:31,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427202378] [2021-05-03 00:15:31,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:15:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:15:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:15:31,181 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 00:15:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:32,288 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-05-03 00:15:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:15:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 33 [2021-05-03 00:15:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:32,290 INFO L225 Difference]: With dead ends: 79 [2021-05-03 00:15:32,290 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:15:32,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1100.9ms TimeCoverageRelationStatistics Valid=185, Invalid=2265, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:15:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:15:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-03 00:15:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-03 00:15:32,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 33 [2021-05-03 00:15:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:32,296 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-03 00:15:32,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 25 states have internal predecessors, (29), 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 00:15:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-03 00:15:32,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:15:32,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:32,296 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:32,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:15:32,297 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash -13699742, now seen corresponding path program 21 times [2021-05-03 00:15:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109835855] [2021-05-03 00:15:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:32,300 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_279 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_279} OutVars{main_~z~0=v_main_~z~0_279} AuxVars[] AssignedVars[] [2021-05-03 00:15:32,302 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:32,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:32,318 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:32,343 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:32,366 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:32,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:32,470 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 00:15:32,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:32,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109835855] [2021-05-03 00:15:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109835855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:32,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:32,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:15:32,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643854457] [2021-05-03 00:15:32,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:15:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:15:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:15:32,934 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 00:15:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:34,172 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-05-03 00:15:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:15:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 34 [2021-05-03 00:15:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:34,180 INFO L225 Difference]: With dead ends: 81 [2021-05-03 00:15:34,181 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:15:34,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1239.7ms TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:15:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:15:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-03 00:15:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-03 00:15:34,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2021-05-03 00:15:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:34,190 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-03 00:15:34,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 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 00:15:34,191 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-03 00:15:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:15:34,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:34,191 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:34,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:15:34,191 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -398389438, now seen corresponding path program 22 times [2021-05-03 00:15:34,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:34,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900368168] [2021-05-03 00:15:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:34,196 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_303 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_303} OutVars{main_~z~0=v_main_~z~0_303} AuxVars[] AssignedVars[] [2021-05-03 00:15:34,198 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:34,206 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:34,222 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:34,238 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:34,260 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:34,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:34,401 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 00:15:34,848 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:34,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900368168] [2021-05-03 00:15:34,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900368168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:34,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:34,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:15:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137643778] [2021-05-03 00:15:34,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:15:34,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:15:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:15:34,850 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 00:15:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:36,155 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2021-05-03 00:15:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:15:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 35 [2021-05-03 00:15:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:36,157 INFO L225 Difference]: With dead ends: 83 [2021-05-03 00:15:36,157 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:15:36,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1290.6ms TimeCoverageRelationStatistics Valid=201, Invalid=2661, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:15:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:15:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-03 00:15:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-03 00:15:36,163 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2021-05-03 00:15:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:36,163 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-03 00:15:36,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 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 00:15:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-03 00:15:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:15:36,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:36,164 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:36,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:15:36,164 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 561131874, now seen corresponding path program 23 times [2021-05-03 00:15:36,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:36,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776022954] [2021-05-03 00:15:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:36,168 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_328 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_328} OutVars{main_~z~0=v_main_~z~0_328} AuxVars[] AssignedVars[] [2021-05-03 00:15:36,170 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:36,170 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:36,183 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:36,206 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:36,227 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:36,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:36,360 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 00:15:36,866 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:36,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776022954] [2021-05-03 00:15:36,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [776022954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:36,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:36,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:15:36,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209911276] [2021-05-03 00:15:36,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:15:36,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:15:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:15:36,868 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 00:15:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:38,157 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-05-03 00:15:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:15:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 36 [2021-05-03 00:15:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:38,159 INFO L225 Difference]: With dead ends: 85 [2021-05-03 00:15:38,159 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 00:15:38,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=209, Invalid=2871, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:15:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 00:15:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-03 00:15:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-03 00:15:38,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 36 [2021-05-03 00:15:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:38,165 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-03 00:15:38,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 28 states have internal predecessors, (32), 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 00:15:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-03 00:15:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:15:38,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:38,166 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:38,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:15:38,166 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 241521474, now seen corresponding path program 24 times [2021-05-03 00:15:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:38,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487122625] [2021-05-03 00:15:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:38,170 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_354 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_354} OutVars{main_~z~0=v_main_~z~0_354} AuxVars[] AssignedVars[] [2021-05-03 00:15:38,172 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:38,181 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:38,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:38,216 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:38,237 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:38,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:38,334 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 00:15:38,878 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:38,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487122625] [2021-05-03 00:15:38,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487122625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:38,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:38,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:15:38,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467368732] [2021-05-03 00:15:38,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:15:38,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:15:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:15:38,880 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 00:15:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:40,244 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-05-03 00:15:40,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:15:40,245 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 37 [2021-05-03 00:15:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:40,245 INFO L225 Difference]: With dead ends: 87 [2021-05-03 00:15:40,246 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:15:40,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1397.1ms TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:15:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:15:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-03 00:15:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-03 00:15:40,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2021-05-03 00:15:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:40,252 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-03 00:15:40,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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 00:15:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-03 00:15:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:15:40,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:40,253 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:40,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:15:40,253 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1076466334, now seen corresponding path program 25 times [2021-05-03 00:15:40,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:40,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241398081] [2021-05-03 00:15:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:40,257 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_381 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_381} OutVars{main_~z~0=v_main_~z~0_381} AuxVars[] AssignedVars[] [2021-05-03 00:15:40,258 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:40,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:40,279 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:40,302 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:40,323 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:40,437 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 00:15:40,911 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:40,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241398081] [2021-05-03 00:15:40,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [241398081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:40,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:40,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:15:40,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978747247] [2021-05-03 00:15:40,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:15:40,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:15:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:15:40,914 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 00:15:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:42,298 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2021-05-03 00:15:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:15:42,299 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 38 [2021-05-03 00:15:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:42,299 INFO L225 Difference]: With dead ends: 89 [2021-05-03 00:15:42,299 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:15:42,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1361.5ms TimeCoverageRelationStatistics Valid=225, Invalid=3315, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:15:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:15:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-05-03 00:15:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-05-03 00:15:42,306 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 38 [2021-05-03 00:15:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:42,306 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-05-03 00:15:42,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 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 00:15:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-05-03 00:15:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:15:42,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:42,307 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:42,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:15:42,307 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1015584578, now seen corresponding path program 26 times [2021-05-03 00:15:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:42,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010521626] [2021-05-03 00:15:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:42,311 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_409 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_409} OutVars{main_~z~0=v_main_~z~0_409} AuxVars[] AssignedVars[] [2021-05-03 00:15:42,313 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:42,327 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:42,343 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:42,359 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:42,380 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:42,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:42,498 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 00:15:43,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:43,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010521626] [2021-05-03 00:15:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010521626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:43,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:43,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:15:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904171920] [2021-05-03 00:15:43,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:15:43,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:15:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:15:43,081 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 00:15:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:44,600 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-05-03 00:15:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:15:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 39 [2021-05-03 00:15:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:44,602 INFO L225 Difference]: With dead ends: 91 [2021-05-03 00:15:44,602 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:15:44,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1544.4ms TimeCoverageRelationStatistics Valid=233, Invalid=3549, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:15:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:15:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-03 00:15:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-05-03 00:15:44,609 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 39 [2021-05-03 00:15:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:44,609 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-05-03 00:15:44,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 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 00:15:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-05-03 00:15:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 00:15:44,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:44,609 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:44,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:15:44,610 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1444653410, now seen corresponding path program 27 times [2021-05-03 00:15:44,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:44,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755657528] [2021-05-03 00:15:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:44,614 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_438 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_438} OutVars{main_~z~0=v_main_~z~0_438} AuxVars[] AssignedVars[] [2021-05-03 00:15:44,615 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:44,616 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:44,631 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:44,655 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:44,676 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:44,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:44,787 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 00:15:45,456 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:45,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755657528] [2021-05-03 00:15:45,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [755657528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:45,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:45,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:15:45,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987674695] [2021-05-03 00:15:45,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:15:45,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:15:45,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:15:45,458 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 00:15:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:47,036 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-05-03 00:15:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:15:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 40 [2021-05-03 00:15:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:47,037 INFO L225 Difference]: With dead ends: 93 [2021-05-03 00:15:47,037 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:15:47,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1658.9ms TimeCoverageRelationStatistics Valid=241, Invalid=3791, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:15:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:15:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-03 00:15:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-03 00:15:47,044 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2021-05-03 00:15:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:47,044 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-03 00:15:47,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 32 states have internal predecessors, (36), 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 00:15:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-03 00:15:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:15:47,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:47,045 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:47,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:15:47,045 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1860885314, now seen corresponding path program 28 times [2021-05-03 00:15:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:47,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308222787] [2021-05-03 00:15:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:47,049 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_468 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_468} OutVars{main_~z~0=v_main_~z~0_468} AuxVars[] AssignedVars[] [2021-05-03 00:15:47,051 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:47,051 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:47,070 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:47,096 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:47,117 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:47,221 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 00:15:47,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308222787] [2021-05-03 00:15:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [308222787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:47,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:47,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:15:47,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553744353] [2021-05-03 00:15:47,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:15:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:15:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:15:47,875 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 00:15:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:49,500 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-05-03 00:15:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:15:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 41 [2021-05-03 00:15:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:49,502 INFO L225 Difference]: With dead ends: 95 [2021-05-03 00:15:49,502 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:15:49,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1687.2ms TimeCoverageRelationStatistics Valid=249, Invalid=4041, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:15:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:15:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-03 00:15:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-03 00:15:49,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2021-05-03 00:15:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:49,509 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-03 00:15:49,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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 00:15:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-03 00:15:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 00:15:49,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:49,509 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:49,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:15:49,509 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1879172450, now seen corresponding path program 29 times [2021-05-03 00:15:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367672516] [2021-05-03 00:15:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:49,513 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_499 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_499} OutVars{main_~z~0=v_main_~z~0_499} AuxVars[] AssignedVars[] [2021-05-03 00:15:49,514 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:49,515 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:49,530 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:49,550 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:49,573 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:49,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:49,723 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 00:15:50,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:50,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367672516] [2021-05-03 00:15:50,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [367672516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:50,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:50,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:15:50,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033146253] [2021-05-03 00:15:50,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:15:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:15:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:15:50,355 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 00:15:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:51,982 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-03 00:15:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:15:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 42 [2021-05-03 00:15:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:51,983 INFO L225 Difference]: With dead ends: 97 [2021-05-03 00:15:51,984 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:15:51,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1591.6ms TimeCoverageRelationStatistics Valid=257, Invalid=4299, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:15:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:15:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-03 00:15:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-03 00:15:52,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2021-05-03 00:15:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:52,002 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-03 00:15:52,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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 00:15:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-03 00:15:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:15:52,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:52,003 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:52,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:15:52,003 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1848893630, now seen corresponding path program 30 times [2021-05-03 00:15:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:52,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358539992] [2021-05-03 00:15:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:52,011 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_531 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_531} OutVars{main_~z~0=v_main_~z~0_531} AuxVars[] AssignedVars[] [2021-05-03 00:15:52,013 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:52,021 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:52,047 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:52,059 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:52,076 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:52,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:52,214 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 00:15:53,023 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:53,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358539992] [2021-05-03 00:15:53,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358539992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:53,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:53,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:15:53,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482473390] [2021-05-03 00:15:53,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:15:53,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:15:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:15:53,025 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 00:15:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:54,609 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-05-03 00:15:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:15:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 43 [2021-05-03 00:15:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:54,611 INFO L225 Difference]: With dead ends: 99 [2021-05-03 00:15:54,611 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:15:54,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1748.4ms TimeCoverageRelationStatistics Valid=265, Invalid=4565, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:15:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:15:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-03 00:15:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-05-03 00:15:54,618 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2021-05-03 00:15:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:54,618 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-05-03 00:15:54,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 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 00:15:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-05-03 00:15:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:15:54,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:54,619 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:54,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:15:54,619 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825118, now seen corresponding path program 31 times [2021-05-03 00:15:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:54,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256327274] [2021-05-03 00:15:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:54,641 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_564 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_564} OutVars{main_~z~0=v_main_~z~0_564} AuxVars[] AssignedVars[] [2021-05-03 00:15:54,642 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:54,653 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:54,689 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:54,704 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:54,726 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:54,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:54,840 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 00:15:55,733 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256327274] [2021-05-03 00:15:55,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256327274] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:55,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:55,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:15:55,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369605878] [2021-05-03 00:15:55,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:15:55,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:15:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:15:55,735 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 00:15:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:15:57,720 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-05-03 00:15:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:15:57,721 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 44 [2021-05-03 00:15:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:15:57,721 INFO L225 Difference]: With dead ends: 101 [2021-05-03 00:15:57,721 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:15:57,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2088.5ms TimeCoverageRelationStatistics Valid=273, Invalid=4839, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 00:15:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:15:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-03 00:15:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:15:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-05-03 00:15:57,728 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 44 [2021-05-03 00:15:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:15:57,728 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-05-03 00:15:57,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 00:15:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-05-03 00:15:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:15:57,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:15:57,728 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:15:57,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:15:57,728 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:15:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:15:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2123603134, now seen corresponding path program 32 times [2021-05-03 00:15:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:15:57,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419401563] [2021-05-03 00:15:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:15:57,733 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_598 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_598} OutVars{main_~z~0=v_main_~z~0_598} AuxVars[] AssignedVars[] [2021-05-03 00:15:57,735 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:15:57,744 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:15:57,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:15:57,776 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:15:57,796 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:15:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:57,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:15:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:15:57,919 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 00:15:58,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:15:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419401563] [2021-05-03 00:15:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1419401563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:15:58,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:15:58,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:15:58,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664894738] [2021-05-03 00:15:58,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:15:58,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:15:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:15:58,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:15:58,726 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 00:16:00,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:00,799 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-05-03 00:16:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:16:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 45 [2021-05-03 00:16:00,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:00,800 INFO L225 Difference]: With dead ends: 103 [2021-05-03 00:16:00,800 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:16:00,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2090.1ms TimeCoverageRelationStatistics Valid=281, Invalid=5121, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 00:16:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:16:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-03 00:16:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-05-03 00:16:00,807 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 45 [2021-05-03 00:16:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:00,807 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-05-03 00:16:00,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 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 00:16:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-05-03 00:16:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 00:16:00,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:00,807 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:00,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:16:00,808 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1380885150, now seen corresponding path program 33 times [2021-05-03 00:16:00,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:00,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600809659] [2021-05-03 00:16:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:00,812 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_633 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_633} OutVars{main_~z~0=v_main_~z~0_633} AuxVars[] AssignedVars[] [2021-05-03 00:16:00,813 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:00,814 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:00,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:00,851 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:00,870 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:00,957 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 00:16:01,744 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:01,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600809659] [2021-05-03 00:16:01,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [600809659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:01,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:01,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:16:01,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898090984] [2021-05-03 00:16:01,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:16:01,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:16:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:16:01,746 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 00:16:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:03,860 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-05-03 00:16:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:16:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 46 [2021-05-03 00:16:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:03,861 INFO L225 Difference]: With dead ends: 105 [2021-05-03 00:16:03,861 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:16:03,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2072.9ms TimeCoverageRelationStatistics Valid=289, Invalid=5411, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 00:16:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:16:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-03 00:16:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-05-03 00:16:03,867 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2021-05-03 00:16:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:03,867 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-05-03 00:16:03,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 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 00:16:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-05-03 00:16:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:16:03,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:03,868 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:03,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:16:03,868 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 168535874, now seen corresponding path program 34 times [2021-05-03 00:16:03,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:03,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620140266] [2021-05-03 00:16:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:03,872 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_669 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_669} OutVars{main_~z~0=v_main_~z~0_669} AuxVars[] AssignedVars[] [2021-05-03 00:16:03,874 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:03,883 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:03,899 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:03,914 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:03,932 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:04,046 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 00:16:04,865 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:04,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620140266] [2021-05-03 00:16:04,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [620140266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:16:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548881294] [2021-05-03 00:16:04,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:16:04,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:16:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:16:04,867 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 00:16:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:06,991 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-05-03 00:16:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:16:06,992 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 47 [2021-05-03 00:16:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:06,992 INFO L225 Difference]: With dead ends: 107 [2021-05-03 00:16:06,993 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:16:06,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 2140.9ms TimeCoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 00:16:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:16:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-03 00:16:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-03 00:16:07,000 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2021-05-03 00:16:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:07,000 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-03 00:16:07,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 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 00:16:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-03 00:16:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:16:07,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:07,001 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:07,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 00:16:07,001 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 955947362, now seen corresponding path program 35 times [2021-05-03 00:16:07,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:07,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478436380] [2021-05-03 00:16:07,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:07,007 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_706 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_706} OutVars{main_~z~0=v_main_~z~0_706} AuxVars[] AssignedVars[] [2021-05-03 00:16:07,008 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:07,017 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:07,056 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:07,074 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:07,115 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:07,249 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 00:16:08,274 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:08,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478436380] [2021-05-03 00:16:08,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478436380] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:08,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:08,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:16:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486418061] [2021-05-03 00:16:08,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:16:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:08,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:16:08,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:16:08,276 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 00:16:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:10,642 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-05-03 00:16:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:16:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 48 [2021-05-03 00:16:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:10,644 INFO L225 Difference]: With dead ends: 109 [2021-05-03 00:16:10,644 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:16:10,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2474.7ms TimeCoverageRelationStatistics Valid=305, Invalid=6015, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 00:16:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:16:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-03 00:16:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-05-03 00:16:10,651 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2021-05-03 00:16:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:10,651 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-05-03 00:16:10,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 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 00:16:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-05-03 00:16:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:16:10,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:10,651 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:10,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 00:16:10,652 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash -404100286, now seen corresponding path program 36 times [2021-05-03 00:16:10,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:10,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242289784] [2021-05-03 00:16:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:10,656 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_744 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_744} OutVars{main_~z~0=v_main_~z~0_744} AuxVars[] AssignedVars[] [2021-05-03 00:16:10,658 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:10,659 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:10,673 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:10,698 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:10,718 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:10,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:10,826 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 00:16:11,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:11,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242289784] [2021-05-03 00:16:11,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [242289784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:11,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:11,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:16:11,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599286929] [2021-05-03 00:16:11,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:16:11,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:16:11,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:16:11,762 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 00:16:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:13,973 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-05-03 00:16:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:16:13,973 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 49 [2021-05-03 00:16:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:13,974 INFO L225 Difference]: With dead ends: 111 [2021-05-03 00:16:13,974 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 00:16:13,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2271.6ms TimeCoverageRelationStatistics Valid=313, Invalid=6329, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 00:16:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 00:16:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-03 00:16:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-05-03 00:16:13,981 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2021-05-03 00:16:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:13,981 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-05-03 00:16:13,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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 00:16:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-05-03 00:16:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:16:13,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:13,981 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:13,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 00:16:13,982 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 384095586, now seen corresponding path program 37 times [2021-05-03 00:16:13,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:13,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580373521] [2021-05-03 00:16:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:13,986 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_783 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_783} OutVars{main_~z~0=v_main_~z~0_783} AuxVars[] AssignedVars[] [2021-05-03 00:16:13,988 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:13,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:14,007 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:14,031 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:14,051 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:14,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:14,161 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 00:16:15,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:15,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580373521] [2021-05-03 00:16:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [580373521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:15,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:16:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503295530] [2021-05-03 00:16:15,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:16:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:16:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:16:15,155 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 00:16:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:17,667 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-05-03 00:16:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:16:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 50 [2021-05-03 00:16:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:17,668 INFO L225 Difference]: With dead ends: 113 [2021-05-03 00:16:17,668 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:16:17,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2510.7ms TimeCoverageRelationStatistics Valid=321, Invalid=6651, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 00:16:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:16:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-03 00:16:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-05-03 00:16:17,675 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 50 [2021-05-03 00:16:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:17,675 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-05-03 00:16:17,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 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 00:16:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-05-03 00:16:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:16:17,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:17,676 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:17,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 00:16:17,676 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash -951636158, now seen corresponding path program 38 times [2021-05-03 00:16:17,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:17,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686975246] [2021-05-03 00:16:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:17,681 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_823 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_823} OutVars{main_~z~0=v_main_~z~0_823} AuxVars[] AssignedVars[] [2021-05-03 00:16:17,683 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:17,693 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:17,708 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:17,725 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:17,746 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:17,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:17,857 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 00:16:18,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:18,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686975246] [2021-05-03 00:16:18,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [686975246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:18,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:18,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:16:18,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676751158] [2021-05-03 00:16:18,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:16:18,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:16:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:16:18,878 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 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 00:16:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:21,516 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-05-03 00:16:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 00:16:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 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) Word has length 51 [2021-05-03 00:16:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:21,517 INFO L225 Difference]: With dead ends: 115 [2021-05-03 00:16:21,517 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 00:16:21,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2631.2ms TimeCoverageRelationStatistics Valid=329, Invalid=6981, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 00:16:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 00:16:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-03 00:16:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-05-03 00:16:21,524 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2021-05-03 00:16:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:21,524 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-05-03 00:16:21,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 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 00:16:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-05-03 00:16:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 00:16:21,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:21,524 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:21,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 00:16:21,525 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash 590352738, now seen corresponding path program 39 times [2021-05-03 00:16:21,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:21,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194403028] [2021-05-03 00:16:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:21,529 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_864 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_864} OutVars{main_~z~0=v_main_~z~0_864} AuxVars[] AssignedVars[] [2021-05-03 00:16:21,530 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:21,540 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:21,558 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:21,572 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:21,592 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:21,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:21,705 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 00:16:22,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:22,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194403028] [2021-05-03 00:16:22,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [194403028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:22,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:22,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:16:22,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95974363] [2021-05-03 00:16:22,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:16:22,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:22,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:16:22,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:16:22,723 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 00:16:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:25,402 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-05-03 00:16:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:16:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 52 [2021-05-03 00:16:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:25,403 INFO L225 Difference]: With dead ends: 117 [2021-05-03 00:16:25,403 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:16:25,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2652.5ms TimeCoverageRelationStatistics Valid=337, Invalid=7319, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 00:16:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:16:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-03 00:16:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-05-03 00:16:25,410 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2021-05-03 00:16:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:25,410 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-05-03 00:16:25,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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 00:16:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-05-03 00:16:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:16:25,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:25,411 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:25,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 00:16:25,411 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1147368258, now seen corresponding path program 40 times [2021-05-03 00:16:25,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:25,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555407347] [2021-05-03 00:16:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:25,418 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_906 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_906} OutVars{main_~z~0=v_main_~z~0_906} AuxVars[] AssignedVars[] [2021-05-03 00:16:25,420 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:25,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:25,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:25,605 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-03 00:16:25,615 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:25,641 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:25,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:25,796 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 00:16:26,883 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555407347] [2021-05-03 00:16:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1555407347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:26,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:26,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:16:26,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236319985] [2021-05-03 00:16:26,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:16:26,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:16:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:16:26,885 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 00:16:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:29,740 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-05-03 00:16:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 00:16:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 53 [2021-05-03 00:16:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:29,741 INFO L225 Difference]: With dead ends: 119 [2021-05-03 00:16:29,741 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:16:29,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2829.2ms TimeCoverageRelationStatistics Valid=345, Invalid=7665, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 00:16:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:16:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-03 00:16:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:29,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-05-03 00:16:29,749 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 53 [2021-05-03 00:16:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:29,749 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-05-03 00:16:29,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 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 00:16:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-05-03 00:16:29,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-03 00:16:29,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:29,750 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:29,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 00:16:29,750 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1234980194, now seen corresponding path program 41 times [2021-05-03 00:16:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:29,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201403565] [2021-05-03 00:16:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:29,758 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_949 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_949} OutVars{main_~z~0=v_main_~z~0_949} AuxVars[] AssignedVars[] [2021-05-03 00:16:29,761 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:29,770 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:29,786 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:29,800 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:29,821 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:29,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:29,935 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 00:16:31,118 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:31,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201403565] [2021-05-03 00:16:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [201403565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:31,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:16:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390251123] [2021-05-03 00:16:31,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:16:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:16:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:16:31,119 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 00:16:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:34,095 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-05-03 00:16:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:16:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 54 [2021-05-03 00:16:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:34,096 INFO L225 Difference]: With dead ends: 121 [2021-05-03 00:16:34,096 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 00:16:34,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2967.0ms TimeCoverageRelationStatistics Valid=353, Invalid=8019, Unknown=0, NotChecked=0, Total=8372 [2021-05-03 00:16:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 00:16:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-05-03 00:16:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-03 00:16:34,104 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 54 [2021-05-03 00:16:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:34,104 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-03 00:16:34,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 46 states have internal predecessors, (50), 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 00:16:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-03 00:16:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:16:34,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:34,105 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:34,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 00:16:34,105 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -344017086, now seen corresponding path program 42 times [2021-05-03 00:16:34,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:34,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397560088] [2021-05-03 00:16:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:34,109 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_993 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_993} OutVars{main_~z~0=v_main_~z~0_993} AuxVars[] AssignedVars[] [2021-05-03 00:16:34,111 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:34,121 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:34,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:34,153 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:34,174 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:34,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:34,301 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 00:16:35,509 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397560088] [2021-05-03 00:16:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397560088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:35,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:35,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-03 00:16:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334642739] [2021-05-03 00:16:35,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 00:16:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 00:16:35,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:16:35,511 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 00:16:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:38,595 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-05-03 00:16:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 00:16:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 55 [2021-05-03 00:16:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:38,596 INFO L225 Difference]: With dead ends: 123 [2021-05-03 00:16:38,596 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:16:38,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3075.1ms TimeCoverageRelationStatistics Valid=361, Invalid=8381, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 00:16:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:16:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-03 00:16:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-05-03 00:16:38,603 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2021-05-03 00:16:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:38,603 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-05-03 00:16:38,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 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 00:16:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-05-03 00:16:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:16:38,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:38,604 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:38,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 00:16:38,604 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2048292510, now seen corresponding path program 43 times [2021-05-03 00:16:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:38,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719399469] [2021-05-03 00:16:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:38,609 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1038 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1038} OutVars{main_~z~0=v_main_~z~0_1038} AuxVars[] AssignedVars[] [2021-05-03 00:16:38,610 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:38,621 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:38,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:38,649 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:38,672 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:38,792 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 00:16:40,051 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719399469] [2021-05-03 00:16:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719399469] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:40,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:40,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:16:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769027796] [2021-05-03 00:16:40,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:16:40,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:16:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:16:40,052 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 00:16:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:43,283 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-05-03 00:16:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:16:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 56 [2021-05-03 00:16:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:43,284 INFO L225 Difference]: With dead ends: 125 [2021-05-03 00:16:43,284 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 00:16:43,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 3215.6ms TimeCoverageRelationStatistics Valid=369, Invalid=8751, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 00:16:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 00:16:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-05-03 00:16:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-05-03 00:16:43,300 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 56 [2021-05-03 00:16:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:43,300 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-05-03 00:16:43,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 00:16:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-05-03 00:16:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 00:16:43,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:43,301 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:43,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 00:16:43,301 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash 953744194, now seen corresponding path program 44 times [2021-05-03 00:16:43,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:43,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946373664] [2021-05-03 00:16:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:43,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1084 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1084} OutVars{main_~z~0=v_main_~z~0_1084} AuxVars[] AssignedVars[] [2021-05-03 00:16:43,307 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:43,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:43,343 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:43,364 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:43,394 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:43,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:43,517 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 00:16:44,723 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946373664] [2021-05-03 00:16:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946373664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:44,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:44,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:16:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180370550] [2021-05-03 00:16:44,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:16:44,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:16:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:16:44,725 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 00:16:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:47,984 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-05-03 00:16:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 00:16:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 57 [2021-05-03 00:16:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:47,985 INFO L225 Difference]: With dead ends: 127 [2021-05-03 00:16:47,985 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:16:47,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 3177.7ms TimeCoverageRelationStatistics Valid=377, Invalid=9129, Unknown=0, NotChecked=0, Total=9506 [2021-05-03 00:16:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:16:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-03 00:16:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-05-03 00:16:47,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 57 [2021-05-03 00:16:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:47,993 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-05-03 00:16:47,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 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 00:16:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-05-03 00:16:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-03 00:16:47,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:47,994 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:47,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 00:16:47,994 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash -472398494, now seen corresponding path program 45 times [2021-05-03 00:16:47,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:47,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660075149] [2021-05-03 00:16:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:48,005 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1131 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1131} OutVars{main_~z~0=v_main_~z~0_1131} AuxVars[] AssignedVars[] [2021-05-03 00:16:48,007 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:48,018 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:48,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:48,048 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:48,074 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:48,186 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 00:16:49,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:49,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660075149] [2021-05-03 00:16:49,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660075149] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:49,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:49,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:16:49,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203863646] [2021-05-03 00:16:49,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:16:49,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:49,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:16:49,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:16:49,661 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 00:16:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:53,316 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2021-05-03 00:16:53,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 00:16:53,317 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 58 [2021-05-03 00:16:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:53,317 INFO L225 Difference]: With dead ends: 129 [2021-05-03 00:16:53,318 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 00:16:53,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 3699.9ms TimeCoverageRelationStatistics Valid=385, Invalid=9515, Unknown=0, NotChecked=0, Total=9900 [2021-05-03 00:16:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 00:16:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-03 00:16:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-05-03 00:16:53,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 58 [2021-05-03 00:16:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:53,326 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-05-03 00:16:53,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 50 states have internal predecessors, (54), 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 00:16:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-05-03 00:16:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-03 00:16:53,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:53,326 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:53,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-03 00:16:53,326 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1733148862, now seen corresponding path program 46 times [2021-05-03 00:16:53,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:53,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491245715] [2021-05-03 00:16:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:53,331 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1179 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1179} OutVars{main_~z~0=v_main_~z~0_1179} AuxVars[] AssignedVars[] [2021-05-03 00:16:53,333 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:53,333 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:53,353 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:53,373 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:53,395 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:53,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:53,519 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 00:16:55,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:16:55,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491245715] [2021-05-03 00:16:55,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491245715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:16:55,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:16:55,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:16:55,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937973922] [2021-05-03 00:16:55,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:16:55,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:16:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:16:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:16:55,193 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 00:16:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:16:58,885 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2021-05-03 00:16:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 00:16:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 59 [2021-05-03 00:16:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:16:58,886 INFO L225 Difference]: With dead ends: 131 [2021-05-03 00:16:58,886 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 00:16:58,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3940.6ms TimeCoverageRelationStatistics Valid=393, Invalid=9909, Unknown=0, NotChecked=0, Total=10302 [2021-05-03 00:16:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 00:16:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-03 00:16:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:16:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-05-03 00:16:58,896 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 59 [2021-05-03 00:16:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:16:58,896 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-05-03 00:16:58,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 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 00:16:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-05-03 00:16:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:16:58,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:16:58,897 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:16:58,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-03 00:16:58,897 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:16:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:16:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2133262690, now seen corresponding path program 47 times [2021-05-03 00:16:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:16:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884440275] [2021-05-03 00:16:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:16:58,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1228 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1228} OutVars{main_~z~0=v_main_~z~0_1228} AuxVars[] AssignedVars[] [2021-05-03 00:16:58,919 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:16:58,920 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:16:58,952 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:16:58,988 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:16:59,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:16:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:59,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:16:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:16:59,159 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 00:17:00,664 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:00,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884440275] [2021-05-03 00:17:00,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884440275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:00,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:00,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:17:00,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904498771] [2021-05-03 00:17:00,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:17:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:17:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:17:00,665 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 00:17:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:04,252 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-05-03 00:17:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:17:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 60 [2021-05-03 00:17:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:04,254 INFO L225 Difference]: With dead ends: 133 [2021-05-03 00:17:04,255 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 00:17:04,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 3657.8ms TimeCoverageRelationStatistics Valid=401, Invalid=10311, Unknown=0, NotChecked=0, Total=10712 [2021-05-03 00:17:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 00:17:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-05-03 00:17:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-05-03 00:17:04,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 60 [2021-05-03 00:17:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:04,265 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-05-03 00:17:04,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 52 states have internal predecessors, (56), 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 00:17:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-05-03 00:17:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-03 00:17:04,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:04,266 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:04,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 00:17:04,266 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1732936514, now seen corresponding path program 48 times [2021-05-03 00:17:04,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:04,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086116200] [2021-05-03 00:17:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:04,281 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1278 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1278} OutVars{main_~z~0=v_main_~z~0_1278} AuxVars[] AssignedVars[] [2021-05-03 00:17:04,283 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:04,284 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:04,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:04,348 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:04,368 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:04,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:04,573 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 00:17:06,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086116200] [2021-05-03 00:17:06,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086116200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:06,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:06,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-03 00:17:06,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840819908] [2021-05-03 00:17:06,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-03 00:17:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-03 00:17:06,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:17:06,191 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 00:17:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:10,269 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-05-03 00:17:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 00:17:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 61 [2021-05-03 00:17:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:10,271 INFO L225 Difference]: With dead ends: 135 [2021-05-03 00:17:10,271 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 00:17:10,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 4129.2ms TimeCoverageRelationStatistics Valid=409, Invalid=10721, Unknown=0, NotChecked=0, Total=11130 [2021-05-03 00:17:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 00:17:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-03 00:17:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-05-03 00:17:10,278 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2021-05-03 00:17:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:10,278 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-05-03 00:17:10,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 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 00:17:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-05-03 00:17:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 00:17:10,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:10,279 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:10,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-03 00:17:10,279 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2087240350, now seen corresponding path program 49 times [2021-05-03 00:17:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:10,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129007946] [2021-05-03 00:17:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:10,284 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1329 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1329} OutVars{main_~z~0=v_main_~z~0_1329} AuxVars[] AssignedVars[] [2021-05-03 00:17:10,285 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:10,296 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:10,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:10,330 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:10,357 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:10,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:10,482 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 00:17:12,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129007946] [2021-05-03 00:17:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129007946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:12,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:12,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:17:12,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147328160] [2021-05-03 00:17:12,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:17:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:17:12,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:17:12,222 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 00:17:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:16,266 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2021-05-03 00:17:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 00:17:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 62 [2021-05-03 00:17:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:16,268 INFO L225 Difference]: With dead ends: 137 [2021-05-03 00:17:16,268 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 00:17:16,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4186.9ms TimeCoverageRelationStatistics Valid=417, Invalid=11139, Unknown=0, NotChecked=0, Total=11556 [2021-05-03 00:17:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 00:17:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-03 00:17:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-05-03 00:17:16,285 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2021-05-03 00:17:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:16,285 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-05-03 00:17:16,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 54 states have internal predecessors, (58), 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 00:17:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-05-03 00:17:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:17:16,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:16,289 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:16,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-03 00:17:16,290 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash -253638846, now seen corresponding path program 50 times [2021-05-03 00:17:16,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:16,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144892233] [2021-05-03 00:17:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:16,294 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1381 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1381} OutVars{main_~z~0=v_main_~z~0_1381} AuxVars[] AssignedVars[] [2021-05-03 00:17:16,297 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:16,309 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:16,326 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:16,340 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:16,363 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:16,472 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 00:17:18,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:18,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144892233] [2021-05-03 00:17:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144892233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:17:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077854494] [2021-05-03 00:17:18,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:17:18,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:17:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:17:18,231 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 00:17:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:22,835 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2021-05-03 00:17:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:17:22,836 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 63 [2021-05-03 00:17:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:22,837 INFO L225 Difference]: With dead ends: 139 [2021-05-03 00:17:22,837 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 00:17:22,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 4454.5ms TimeCoverageRelationStatistics Valid=425, Invalid=11565, Unknown=0, NotChecked=0, Total=11990 [2021-05-03 00:17:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 00:17:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-03 00:17:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-05-03 00:17:22,845 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 63 [2021-05-03 00:17:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:22,845 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-05-03 00:17:22,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 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 00:17:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-05-03 00:17:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-03 00:17:22,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:22,846 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:22,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 00:17:22,847 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 753432930, now seen corresponding path program 51 times [2021-05-03 00:17:22,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:22,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990050487] [2021-05-03 00:17:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:22,852 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1434 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1434} OutVars{main_~z~0=v_main_~z~0_1434} AuxVars[] AssignedVars[] [2021-05-03 00:17:22,853 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:22,869 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:22,888 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:22,916 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:22,939 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:23,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:23,126 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 00:17:24,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:24,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990050487] [2021-05-03 00:17:24,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [990050487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:24,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:24,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-03 00:17:24,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692917160] [2021-05-03 00:17:24,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-03 00:17:24,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:24,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-03 00:17:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:17:24,935 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 00:17:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:29,893 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2021-05-03 00:17:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 00:17:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 64 [2021-05-03 00:17:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:29,895 INFO L225 Difference]: With dead ends: 141 [2021-05-03 00:17:29,895 INFO L226 Difference]: Without dead ends: 75 [2021-05-03 00:17:29,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 4787.0ms TimeCoverageRelationStatistics Valid=433, Invalid=11999, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 00:17:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-03 00:17:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-03 00:17:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-05-03 00:17:29,903 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 64 [2021-05-03 00:17:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:29,903 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-05-03 00:17:29,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 56 states have internal predecessors, (60), 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 00:17:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-05-03 00:17:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:17:29,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:29,904 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:29,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-03 00:17:29,904 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1907886914, now seen corresponding path program 52 times [2021-05-03 00:17:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:29,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173976524] [2021-05-03 00:17:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:29,913 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1488 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1488} OutVars{main_~z~0=v_main_~z~0_1488} AuxVars[] AssignedVars[] [2021-05-03 00:17:29,917 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:29,918 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:29,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:29,954 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:29,971 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:30,077 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 00:17:31,689 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:31,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173976524] [2021-05-03 00:17:31,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [173976524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:31,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:31,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:17:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213163869] [2021-05-03 00:17:31,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:17:31,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:17:31,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:17:31,693 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 00:17:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:36,355 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2021-05-03 00:17:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 00:17:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 65 [2021-05-03 00:17:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:36,357 INFO L225 Difference]: With dead ends: 143 [2021-05-03 00:17:36,357 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 00:17:36,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 4330.2ms TimeCoverageRelationStatistics Valid=441, Invalid=12441, Unknown=0, NotChecked=0, Total=12882 [2021-05-03 00:17:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 00:17:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-03 00:17:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:36,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-05-03 00:17:36,365 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 65 [2021-05-03 00:17:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:36,365 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-05-03 00:17:36,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 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 00:17:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-05-03 00:17:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:17:36,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:36,366 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:36,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-03 00:17:36,366 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:36,367 INFO L82 PathProgramCache]: Analyzing trace with hash -958745246, now seen corresponding path program 53 times [2021-05-03 00:17:36,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:36,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835567692] [2021-05-03 00:17:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:36,371 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1543 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1543} OutVars{main_~z~0=v_main_~z~0_1543} AuxVars[] AssignedVars[] [2021-05-03 00:17:36,373 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:36,385 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:36,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:36,420 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:36,445 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:36,548 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 00:17:38,454 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:38,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835567692] [2021-05-03 00:17:38,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [835567692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:38,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:38,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:17:38,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791800116] [2021-05-03 00:17:38,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:17:38,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:17:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:17:38,456 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 00:17:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:43,077 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2021-05-03 00:17:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:17:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 66 [2021-05-03 00:17:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:43,078 INFO L225 Difference]: With dead ends: 145 [2021-05-03 00:17:43,078 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 00:17:43,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 4641.0ms TimeCoverageRelationStatistics Valid=449, Invalid=12891, Unknown=0, NotChecked=0, Total=13340 [2021-05-03 00:17:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 00:17:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-05-03 00:17:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-05-03 00:17:43,091 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 66 [2021-05-03 00:17:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:43,099 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-05-03 00:17:43,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 58 states have internal predecessors, (62), 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 00:17:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-05-03 00:17:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:17:43,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:43,106 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:43,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-03 00:17:43,106 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:43,106 INFO L82 PathProgramCache]: Analyzing trace with hash 369971010, now seen corresponding path program 54 times [2021-05-03 00:17:43,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:43,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346145667] [2021-05-03 00:17:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:43,110 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1599 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1599} OutVars{main_~z~0=v_main_~z~0_1599} AuxVars[] AssignedVars[] [2021-05-03 00:17:43,120 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:43,121 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:43,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:43,163 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:43,188 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:43,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:43,323 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 00:17:45,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346145667] [2021-05-03 00:17:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346145667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:45,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:45,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-03 00:17:45,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305351928] [2021-05-03 00:17:45,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-03 00:17:45,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-03 00:17:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:17:45,356 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 00:17:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:50,564 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-05-03 00:17:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 00:17:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 67 [2021-05-03 00:17:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:50,566 INFO L225 Difference]: With dead ends: 147 [2021-05-03 00:17:50,566 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 00:17:50,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 5145.2ms TimeCoverageRelationStatistics Valid=457, Invalid=13349, Unknown=0, NotChecked=0, Total=13806 [2021-05-03 00:17:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 00:17:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-03 00:17:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-05-03 00:17:50,579 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 67 [2021-05-03 00:17:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:50,579 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-05-03 00:17:50,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 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 00:17:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-05-03 00:17:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-03 00:17:50,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:50,580 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:50,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-03 00:17:50,581 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1389498014, now seen corresponding path program 55 times [2021-05-03 00:17:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:50,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658203357] [2021-05-03 00:17:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:50,587 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1656 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1656} OutVars{main_~z~0=v_main_~z~0_1656} AuxVars[] AssignedVars[] [2021-05-03 00:17:50,591 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:50,600 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:50,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:50,646 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:50,672 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:50,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:50,880 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 00:17:53,125 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:17:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658203357] [2021-05-03 00:17:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658203357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:17:53,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:17:53,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:17:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119911770] [2021-05-03 00:17:53,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:17:53,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:17:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:17:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:17:53,127 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 00:17:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:17:57,782 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2021-05-03 00:17:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 00:17:57,783 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 68 [2021-05-03 00:17:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:17:57,783 INFO L225 Difference]: With dead ends: 149 [2021-05-03 00:17:57,783 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 00:17:57,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 5067.0ms TimeCoverageRelationStatistics Valid=465, Invalid=13815, Unknown=0, NotChecked=0, Total=14280 [2021-05-03 00:17:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 00:17:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-03 00:17:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:17:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-05-03 00:17:57,792 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 68 [2021-05-03 00:17:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:17:57,792 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-05-03 00:17:57,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 60 states have internal predecessors, (64), 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 00:17:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-05-03 00:17:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-03 00:17:57,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:17:57,793 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:17:57,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-03 00:17:57,794 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:17:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:17:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash -98462910, now seen corresponding path program 56 times [2021-05-03 00:17:57,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:17:57,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670078554] [2021-05-03 00:17:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:17:57,798 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1714 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1714} OutVars{main_~z~0=v_main_~z~0_1714} AuxVars[] AssignedVars[] [2021-05-03 00:17:57,800 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:17:57,811 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:17:57,828 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:17:57,844 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:17:57,871 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:17:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:58,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:17:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:17:58,042 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 00:18:00,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670078554] [2021-05-03 00:18:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [670078554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:00,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:00,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-03 00:18:00,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910578813] [2021-05-03 00:18:00,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-03 00:18:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-03 00:18:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:18:00,244 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 00:18:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:05,576 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2021-05-03 00:18:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:18:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 69 [2021-05-03 00:18:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:05,578 INFO L225 Difference]: With dead ends: 151 [2021-05-03 00:18:05,578 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 00:18:05,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 5387.2ms TimeCoverageRelationStatistics Valid=473, Invalid=14289, Unknown=0, NotChecked=0, Total=14762 [2021-05-03 00:18:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 00:18:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-03 00:18:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-05-03 00:18:05,587 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2021-05-03 00:18:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:05,587 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-05-03 00:18:05,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 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 00:18:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-05-03 00:18:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-03 00:18:05,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:05,588 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:05,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-03 00:18:05,588 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1268919650, now seen corresponding path program 57 times [2021-05-03 00:18:05,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:05,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269891483] [2021-05-03 00:18:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:05,594 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1773 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1773} OutVars{main_~z~0=v_main_~z~0_1773} AuxVars[] AssignedVars[] [2021-05-03 00:18:05,596 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:05,609 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:05,629 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:05,649 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:05,676 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:05,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:05,808 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 00:18:08,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:08,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269891483] [2021-05-03 00:18:08,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269891483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:08,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:08,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-03 00:18:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892153576] [2021-05-03 00:18:08,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-03 00:18:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-03 00:18:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:18:08,220 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 00:18:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:14,216 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2021-05-03 00:18:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:18:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 70 [2021-05-03 00:18:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:14,218 INFO L225 Difference]: With dead ends: 153 [2021-05-03 00:18:14,218 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 00:18:14,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 6006.9ms TimeCoverageRelationStatistics Valid=481, Invalid=14771, Unknown=0, NotChecked=0, Total=15252 [2021-05-03 00:18:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 00:18:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-03 00:18:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-05-03 00:18:14,229 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 70 [2021-05-03 00:18:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:14,229 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-05-03 00:18:14,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 62 states have internal predecessors, (66), 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 00:18:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-05-03 00:18:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-03 00:18:14,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:14,231 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:14,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-03 00:18:14,231 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:14,231 INFO L82 PathProgramCache]: Analyzing trace with hash 708106050, now seen corresponding path program 58 times [2021-05-03 00:18:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:14,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242245513] [2021-05-03 00:18:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:14,247 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1833 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1833} OutVars{main_~z~0=v_main_~z~0_1833} AuxVars[] AssignedVars[] [2021-05-03 00:18:14,249 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:14,260 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:14,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:14,294 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:14,318 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:14,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:14,469 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 00:18:16,738 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:16,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242245513] [2021-05-03 00:18:16,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [242245513] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:16,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:16,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-03 00:18:16,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101718747] [2021-05-03 00:18:16,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-03 00:18:16,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:16,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-03 00:18:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:18:16,740 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 00:18:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:22,811 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-05-03 00:18:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 00:18:22,813 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 71 [2021-05-03 00:18:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:22,828 INFO L225 Difference]: With dead ends: 155 [2021-05-03 00:18:22,829 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 00:18:22,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 5861.2ms TimeCoverageRelationStatistics Valid=489, Invalid=15261, Unknown=0, NotChecked=0, Total=15750 [2021-05-03 00:18:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 00:18:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-03 00:18:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-05-03 00:18:22,847 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2021-05-03 00:18:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:22,847 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-05-03 00:18:22,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 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 00:18:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-05-03 00:18:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-03 00:18:22,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:22,848 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:22,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-03 00:18:22,848 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash 502753634, now seen corresponding path program 59 times [2021-05-03 00:18:22,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:22,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464189725] [2021-05-03 00:18:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:22,865 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1894 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1894} OutVars{main_~z~0=v_main_~z~0_1894} AuxVars[] AssignedVars[] [2021-05-03 00:18:22,867 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:22,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:22,908 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:22,926 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:22,961 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:23,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:23,075 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 00:18:25,593 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:25,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464189725] [2021-05-03 00:18:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464189725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:25,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:25,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-03 00:18:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462153255] [2021-05-03 00:18:25,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-03 00:18:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-03 00:18:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:18:25,595 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 00:18:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:30,938 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2021-05-03 00:18:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 00:18:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 72 [2021-05-03 00:18:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:30,939 INFO L225 Difference]: With dead ends: 157 [2021-05-03 00:18:30,939 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 00:18:30,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 5592.7ms TimeCoverageRelationStatistics Valid=497, Invalid=15759, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 00:18:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 00:18:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-05-03 00:18:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-05-03 00:18:30,947 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 72 [2021-05-03 00:18:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:30,947 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-05-03 00:18:30,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 64 states have internal predecessors, (68), 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 00:18:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-05-03 00:18:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-03 00:18:30,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:30,947 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:30,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-03 00:18:30,948 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1568203966, now seen corresponding path program 60 times [2021-05-03 00:18:30,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:30,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155775815] [2021-05-03 00:18:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:30,968 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_1956 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_1956} OutVars{main_~z~0=v_main_~z~0_1956} AuxVars[] AssignedVars[] [2021-05-03 00:18:30,969 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:30,984 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:31,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:31,044 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:31,066 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:31,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:31,201 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 00:18:33,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:33,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155775815] [2021-05-03 00:18:33,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155775815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:33,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:33,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-03 00:18:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863951617] [2021-05-03 00:18:33,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-03 00:18:33,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-03 00:18:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:18:33,222 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 00:18:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:38,144 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2021-05-03 00:18:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 00:18:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 73 [2021-05-03 00:18:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:38,146 INFO L225 Difference]: With dead ends: 159 [2021-05-03 00:18:38,146 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 00:18:38,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 4835.6ms TimeCoverageRelationStatistics Valid=505, Invalid=16265, Unknown=0, NotChecked=0, Total=16770 [2021-05-03 00:18:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 00:18:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-03 00:18:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-05-03 00:18:38,154 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 73 [2021-05-03 00:18:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-05-03 00:18:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 00:18:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-05-03 00:18:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-03 00:18:38,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:38,155 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:38,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-03 00:18:38,155 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1343380126, now seen corresponding path program 61 times [2021-05-03 00:18:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:38,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957574629] [2021-05-03 00:18:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:38,167 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2019 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2019} OutVars{main_~z~0=v_main_~z~0_2019} AuxVars[] AssignedVars[] [2021-05-03 00:18:38,169 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:38,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:38,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:38,207 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:38,229 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:38,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:38,344 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 00:18:40,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:40,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957574629] [2021-05-03 00:18:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1957574629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:40,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:40,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-03 00:18:40,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407210788] [2021-05-03 00:18:40,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-03 00:18:40,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-03 00:18:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:18:40,281 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 00:18:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:46,697 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2021-05-03 00:18:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 00:18:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 74 [2021-05-03 00:18:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:46,699 INFO L225 Difference]: With dead ends: 161 [2021-05-03 00:18:46,699 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 00:18:46,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 5708.6ms TimeCoverageRelationStatistics Valid=513, Invalid=16779, Unknown=0, NotChecked=0, Total=17292 [2021-05-03 00:18:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 00:18:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-05-03 00:18:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-05-03 00:18:46,708 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 74 [2021-05-03 00:18:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-05-03 00:18:46,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 66 states have internal predecessors, (70), 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 00:18:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-05-03 00:18:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-03 00:18:46,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:46,709 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:46,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-03 00:18:46,710 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1331191618, now seen corresponding path program 62 times [2021-05-03 00:18:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:46,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806945653] [2021-05-03 00:18:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:46,715 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2083 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2083} OutVars{main_~z~0=v_main_~z~0_2083} AuxVars[] AssignedVars[] [2021-05-03 00:18:46,717 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:46,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:46,748 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:46,771 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:46,796 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:46,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:46,961 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 00:18:49,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:18:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806945653] [2021-05-03 00:18:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806945653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:18:49,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:18:49,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-03 00:18:49,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76452992] [2021-05-03 00:18:49,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-03 00:18:49,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:18:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-03 00:18:49,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:18:49,981 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 00:18:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:18:57,725 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-05-03 00:18:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 00:18:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 75 [2021-05-03 00:18:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:18:57,727 INFO L225 Difference]: With dead ends: 163 [2021-05-03 00:18:57,727 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 00:18:57,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 7528.3ms TimeCoverageRelationStatistics Valid=521, Invalid=17301, Unknown=0, NotChecked=0, Total=17822 [2021-05-03 00:18:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 00:18:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-03 00:18:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:18:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-05-03 00:18:57,736 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 75 [2021-05-03 00:18:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:18:57,736 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-05-03 00:18:57,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 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 00:18:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-05-03 00:18:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-03 00:18:57,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:18:57,737 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:18:57,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-03 00:18:57,737 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:18:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:18:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1656430238, now seen corresponding path program 63 times [2021-05-03 00:18:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:18:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825260463] [2021-05-03 00:18:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:18:57,743 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2148 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2148} OutVars{main_~z~0=v_main_~z~0_2148} AuxVars[] AssignedVars[] [2021-05-03 00:18:57,745 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:18:57,746 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:18:57,847 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:18:57,882 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:18:57,914 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:18:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:58,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:18:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:18:58,064 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 00:19:01,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:01,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825260463] [2021-05-03 00:19:01,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [825260463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:01,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:01,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-03 00:19:01,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041481126] [2021-05-03 00:19:01,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-03 00:19:01,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:01,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-03 00:19:01,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 00:19:01,395 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 00:19:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:09,642 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2021-05-03 00:19:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 00:19:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 76 [2021-05-03 00:19:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:09,644 INFO L225 Difference]: With dead ends: 165 [2021-05-03 00:19:09,644 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 00:19:09,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 8199.8ms TimeCoverageRelationStatistics Valid=529, Invalid=17831, Unknown=0, NotChecked=0, Total=18360 [2021-05-03 00:19:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 00:19:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-03 00:19:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:19:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-05-03 00:19:09,654 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2021-05-03 00:19:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:09,654 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-05-03 00:19:09,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 68 states have internal predecessors, (72), 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 00:19:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-05-03 00:19:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-03 00:19:09,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:09,655 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:09,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-03 00:19:09,655 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 216572738, now seen corresponding path program 64 times [2021-05-03 00:19:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:09,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019772453] [2021-05-03 00:19:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:09,661 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2214 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2214} OutVars{main_~z~0=v_main_~z~0_2214} AuxVars[] AssignedVars[] [2021-05-03 00:19:09,663 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:19:09,664 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:09,687 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:19:09,721 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:19:09,761 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:09,907 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 00:19:13,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:13,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019772453] [2021-05-03 00:19:13,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019772453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:13,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:13,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-03 00:19:13,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284422673] [2021-05-03 00:19:13,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-03 00:19:13,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-03 00:19:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:19:13,239 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 00:19:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:21,275 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2021-05-03 00:19:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 00:19:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 77 [2021-05-03 00:19:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:21,278 INFO L225 Difference]: With dead ends: 167 [2021-05-03 00:19:21,278 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 00:19:21,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 7997.0ms TimeCoverageRelationStatistics Valid=537, Invalid=18369, Unknown=0, NotChecked=0, Total=18906 [2021-05-03 00:19:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 00:19:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-03 00:19:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:19:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-05-03 00:19:21,287 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 77 [2021-05-03 00:19:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:21,287 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-05-03 00:19:21,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 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 00:19:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-05-03 00:19:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-03 00:19:21,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:21,287 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:21,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-03 00:19:21,288 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1849877150, now seen corresponding path program 65 times [2021-05-03 00:19:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:21,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891091323] [2021-05-03 00:19:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:21,298 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2281 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2281} OutVars{main_~z~0=v_main_~z~0_2281} AuxVars[] AssignedVars[] [2021-05-03 00:19:21,300 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:19:21,338 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:21,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:19:21,378 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:19:21,401 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:21,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:21,513 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 00:19:24,071 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891091323] [2021-05-03 00:19:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [891091323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:24,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:24,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-03 00:19:24,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896219683] [2021-05-03 00:19:24,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-03 00:19:24,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-03 00:19:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 00:19:24,073 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 00:19:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:30,718 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-05-03 00:19:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 00:19:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 78 [2021-05-03 00:19:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:30,722 INFO L225 Difference]: With dead ends: 169 [2021-05-03 00:19:30,722 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 00:19:30,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 6381.9ms TimeCoverageRelationStatistics Valid=545, Invalid=18915, Unknown=0, NotChecked=0, Total=19460 [2021-05-03 00:19:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 00:19:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-03 00:19:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:19:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-05-03 00:19:30,743 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 78 [2021-05-03 00:19:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:30,743 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-05-03 00:19:30,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 70 states have internal predecessors, (74), 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 00:19:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-05-03 00:19:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-03 00:19:30,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:30,744 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:30,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-03 00:19:30,744 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1485314238, now seen corresponding path program 66 times [2021-05-03 00:19:30,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:30,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969805529] [2021-05-03 00:19:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:30,754 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2349 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2349} OutVars{main_~z~0=v_main_~z~0_2349} AuxVars[] AssignedVars[] [2021-05-03 00:19:30,756 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:19:30,757 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:30,773 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:19:30,800 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:19:30,829 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:30,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:30,958 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 00:19:34,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:34,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969805529] [2021-05-03 00:19:34,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969805529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:34,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:34,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-03 00:19:34,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676637009] [2021-05-03 00:19:34,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-03 00:19:34,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:34,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-03 00:19:34,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:19:34,304 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 00:19:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:44,392 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-05-03 00:19:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 00:19:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 79 [2021-05-03 00:19:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:44,394 INFO L225 Difference]: With dead ends: 171 [2021-05-03 00:19:44,394 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 00:19:44,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 9056.9ms TimeCoverageRelationStatistics Valid=553, Invalid=19469, Unknown=0, NotChecked=0, Total=20022 [2021-05-03 00:19:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 00:19:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-03 00:19:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:19:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-05-03 00:19:44,404 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 79 [2021-05-03 00:19:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:44,404 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-05-03 00:19:44,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 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 00:19:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-05-03 00:19:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-03 00:19:44,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:44,405 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:44,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-03 00:19:44,405 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1226201442, now seen corresponding path program 67 times [2021-05-03 00:19:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567360324] [2021-05-03 00:19:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:44,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2418 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2418} OutVars{main_~z~0=v_main_~z~0_2418} AuxVars[] AssignedVars[] [2021-05-03 00:19:44,413 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:19:44,427 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:44,450 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:19:44,472 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:19:44,506 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:44,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:44,692 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 00:19:48,840 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:19:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567360324] [2021-05-03 00:19:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567360324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:19:48,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:19:48,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-03 00:19:48,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366425912] [2021-05-03 00:19:48,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-03 00:19:48,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:19:48,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-03 00:19:48,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 00:19:48,842 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 00:19:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:19:59,591 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2021-05-03 00:19:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-03 00:19:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 80 [2021-05-03 00:19:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:19:59,594 INFO L225 Difference]: With dead ends: 173 [2021-05-03 00:19:59,594 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 00:19:59,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 10267.8ms TimeCoverageRelationStatistics Valid=561, Invalid=20031, Unknown=0, NotChecked=0, Total=20592 [2021-05-03 00:19:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 00:19:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-05-03 00:19:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:19:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-05-03 00:19:59,604 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 80 [2021-05-03 00:19:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:19:59,604 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-05-03 00:19:59,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 00:19:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-05-03 00:19:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-03 00:19:59,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:19:59,605 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:19:59,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-03 00:19:59,605 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:19:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:19:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -616158398, now seen corresponding path program 68 times [2021-05-03 00:19:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:19:59,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148024558] [2021-05-03 00:19:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:19:59,611 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2488 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2488} OutVars{main_~z~0=v_main_~z~0_2488} AuxVars[] AssignedVars[] [2021-05-03 00:19:59,614 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:19:59,615 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:19:59,640 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:19:59,676 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:19:59,713 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:19:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:59,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:19:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:19:59,857 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 00:20:04,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:04,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148024558] [2021-05-03 00:20:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148024558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:04,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:04,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-03 00:20:04,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696571302] [2021-05-03 00:20:04,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-03 00:20:04,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:04,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-03 00:20:04,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:20:04,577 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 00:20:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:13,740 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2021-05-03 00:20:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 00:20:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 81 [2021-05-03 00:20:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:13,742 INFO L225 Difference]: With dead ends: 175 [2021-05-03 00:20:13,742 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 00:20:13,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 9861.1ms TimeCoverageRelationStatistics Valid=569, Invalid=20601, Unknown=0, NotChecked=0, Total=21170 [2021-05-03 00:20:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 00:20:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-03 00:20:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:20:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-05-03 00:20:13,751 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 81 [2021-05-03 00:20:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:13,752 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-05-03 00:20:13,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 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 00:20:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-05-03 00:20:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-03 00:20:13,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:13,752 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:13,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-03 00:20:13,752 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1894738590, now seen corresponding path program 69 times [2021-05-03 00:20:13,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:13,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035078469] [2021-05-03 00:20:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:13,756 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2559 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2559} OutVars{main_~z~0=v_main_~z~0_2559} AuxVars[] AssignedVars[] [2021-05-03 00:20:13,758 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:20:13,758 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:13,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:20:13,802 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:20:13,823 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:13,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:13,944 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 00:20:16,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:16,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035078469] [2021-05-03 00:20:16,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035078469] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:16,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:16,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-03 00:20:16,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286819394] [2021-05-03 00:20:16,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-03 00:20:16,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-03 00:20:16,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 00:20:16,710 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 00:20:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:24,225 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2021-05-03 00:20:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 00:20:24,226 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 82 [2021-05-03 00:20:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:24,226 INFO L225 Difference]: With dead ends: 177 [2021-05-03 00:20:24,226 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 00:20:24,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 7007.6ms TimeCoverageRelationStatistics Valid=577, Invalid=21179, Unknown=0, NotChecked=0, Total=21756 [2021-05-03 00:20:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 00:20:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-03 00:20:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:20:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-05-03 00:20:24,235 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 82 [2021-05-03 00:20:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:24,236 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-05-03 00:20:24,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 74 states have internal predecessors, (78), 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 00:20:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-05-03 00:20:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-03 00:20:24,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:24,236 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:24,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-03 00:20:24,236 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1418948418, now seen corresponding path program 70 times [2021-05-03 00:20:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:24,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774249151] [2021-05-03 00:20:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:24,240 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2631 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2631} OutVars{main_~z~0=v_main_~z~0_2631} AuxVars[] AssignedVars[] [2021-05-03 00:20:24,242 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:20:24,251 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:24,264 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:20:24,277 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:20:24,302 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:24,387 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 00:20:27,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774249151] [2021-05-03 00:20:27,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [774249151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:27,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:27,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-03 00:20:27,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829234958] [2021-05-03 00:20:27,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-03 00:20:27,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-03 00:20:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:20:27,491 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 00:20:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:36,750 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2021-05-03 00:20:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 00:20:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 83 [2021-05-03 00:20:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:36,753 INFO L225 Difference]: With dead ends: 179 [2021-05-03 00:20:36,753 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 00:20:36,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 8033.1ms TimeCoverageRelationStatistics Valid=585, Invalid=21765, Unknown=0, NotChecked=0, Total=22350 [2021-05-03 00:20:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 00:20:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-03 00:20:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:20:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-03 00:20:36,795 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2021-05-03 00:20:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:36,795 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-03 00:20:36,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 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 00:20:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-03 00:20:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-03 00:20:36,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:36,796 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:36,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-03 00:20:36,796 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1064030562, now seen corresponding path program 71 times [2021-05-03 00:20:36,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:36,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085817623] [2021-05-03 00:20:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:36,803 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2704 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2704} OutVars{main_~z~0=v_main_~z~0_2704} AuxVars[] AssignedVars[] [2021-05-03 00:20:36,804 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:20:36,829 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:36,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:20:36,915 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:20:36,979 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:37,225 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 18 [2021-05-03 00:20:37,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:37,352 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 00:20:40,697 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:40,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085817623] [2021-05-03 00:20:40,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085817623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:40,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:40,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-03 00:20:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845917210] [2021-05-03 00:20:40,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-03 00:20:40,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-03 00:20:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 00:20:40,699 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 00:20:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:20:48,832 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2021-05-03 00:20:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 00:20:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 84 [2021-05-03 00:20:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:20:48,834 INFO L225 Difference]: With dead ends: 181 [2021-05-03 00:20:48,834 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 00:20:48,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 8109.2ms TimeCoverageRelationStatistics Valid=593, Invalid=22359, Unknown=0, NotChecked=0, Total=22952 [2021-05-03 00:20:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 00:20:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-05-03 00:20:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:20:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-05-03 00:20:48,844 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 84 [2021-05-03 00:20:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:20:48,844 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-05-03 00:20:48,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 76 states have internal predecessors, (80), 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 00:20:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-05-03 00:20:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-03 00:20:48,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:20:48,844 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:20:48,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-03 00:20:48,845 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:20:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:20:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1348488382, now seen corresponding path program 72 times [2021-05-03 00:20:48,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:20:48,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118525842] [2021-05-03 00:20:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:20:48,849 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2778 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2778} OutVars{main_~z~0=v_main_~z~0_2778} AuxVars[] AssignedVars[] [2021-05-03 00:20:48,850 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:20:48,859 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:20:48,876 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:20:48,896 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:20:48,916 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:20:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:49,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:20:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:20:49,015 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 00:20:52,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:20:52,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118525842] [2021-05-03 00:20:52,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1118525842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:20:52,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:20:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-03 00:20:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219325287] [2021-05-03 00:20:52,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-03 00:20:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:20:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-03 00:20:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:20:52,476 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 00:21:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:21:03,516 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2021-05-03 00:21:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 00:21:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 85 [2021-05-03 00:21:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:21:03,518 INFO L225 Difference]: With dead ends: 183 [2021-05-03 00:21:03,518 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 00:21:03,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 9560.7ms TimeCoverageRelationStatistics Valid=601, Invalid=22961, Unknown=0, NotChecked=0, Total=23562 [2021-05-03 00:21:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 00:21:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-03 00:21:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:21:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-05-03 00:21:03,527 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 85 [2021-05-03 00:21:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:21:03,528 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-05-03 00:21:03,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 77 states have internal predecessors, (81), 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 00:21:03,528 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-05-03 00:21:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-03 00:21:03,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:21:03,528 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:21:03,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-03 00:21:03,528 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:21:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:21:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1172835682, now seen corresponding path program 73 times [2021-05-03 00:21:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:21:03,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798937180] [2021-05-03 00:21:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:21:03,535 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2853 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2853} OutVars{main_~z~0=v_main_~z~0_2853} AuxVars[] AssignedVars[] [2021-05-03 00:21:03,550 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:21:03,560 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:21:03,582 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:21:03,597 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:21:03,638 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:21:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:03,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:21:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:03,750 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 00:21:07,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:21:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798937180] [2021-05-03 00:21:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798937180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:21:07,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:21:07,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-03 00:21:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50040646] [2021-05-03 00:21:07,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-03 00:21:07,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:21:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-03 00:21:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 00:21:07,271 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 00:21:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:21:16,350 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2021-05-03 00:21:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 00:21:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 86 [2021-05-03 00:21:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:21:16,353 INFO L225 Difference]: With dead ends: 185 [2021-05-03 00:21:16,353 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 00:21:16,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 8175.2ms TimeCoverageRelationStatistics Valid=609, Invalid=23571, Unknown=0, NotChecked=0, Total=24180 [2021-05-03 00:21:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 00:21:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-03 00:21:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:21:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-05-03 00:21:16,365 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 86 [2021-05-03 00:21:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:21:16,366 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-05-03 00:21:16,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 78 states have internal predecessors, (82), 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 00:21:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-05-03 00:21:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-03 00:21:16,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:21:16,366 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:21:16,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-03 00:21:16,366 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:21:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:21:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2024470338, now seen corresponding path program 74 times [2021-05-03 00:21:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:21:16,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046664152] [2021-05-03 00:21:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:21:16,379 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_2929 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_2929} OutVars{main_~z~0=v_main_~z~0_2929} AuxVars[] AssignedVars[] [2021-05-03 00:21:16,381 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:21:16,398 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:21:16,439 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:21:16,463 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:21:16,510 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:21:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:16,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:21:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:16,745 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 00:21:21,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:21:21,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046664152] [2021-05-03 00:21:21,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046664152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:21:21,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:21:21,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-03 00:21:21,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275075346] [2021-05-03 00:21:21,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-03 00:21:21,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:21:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-03 00:21:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 00:21:21,020 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 00:21:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:21:31,002 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2021-05-03 00:21:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 00:21:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 87 [2021-05-03 00:21:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:21:31,005 INFO L225 Difference]: With dead ends: 187 [2021-05-03 00:21:31,005 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 00:21:31,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 9591.4ms TimeCoverageRelationStatistics Valid=617, Invalid=24189, Unknown=0, NotChecked=0, Total=24806 [2021-05-03 00:21:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 00:21:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-03 00:21:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:21:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-05-03 00:21:31,015 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 87 [2021-05-03 00:21:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:21:31,029 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-05-03 00:21:31,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 80 states have (on average 1.0375) internal successors, (83), 79 states have internal predecessors, (83), 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 00:21:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-05-03 00:21:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-03 00:21:31,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:21:31,029 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:21:31,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-03 00:21:31,030 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:21:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:21:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1639626398, now seen corresponding path program 75 times [2021-05-03 00:21:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:21:31,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247106734] [2021-05-03 00:21:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:21:31,042 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3006 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3006} OutVars{main_~z~0=v_main_~z~0_3006} AuxVars[] AssignedVars[] [2021-05-03 00:21:31,057 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:21:31,058 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:21:31,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:21:31,142 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:21:31,189 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:21:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:31,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:21:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:31,407 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 00:21:38,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:21:38,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247106734] [2021-05-03 00:21:38,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247106734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:21:38,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:21:38,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-03 00:21:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045616101] [2021-05-03 00:21:38,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-03 00:21:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:21:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-03 00:21:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 00:21:38,914 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 00:21:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:21:50,057 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2021-05-03 00:21:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 00:21:50,058 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 88 [2021-05-03 00:21:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:21:50,058 INFO L225 Difference]: With dead ends: 189 [2021-05-03 00:21:50,058 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 00:21:50,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 13465.5ms TimeCoverageRelationStatistics Valid=625, Invalid=24815, Unknown=0, NotChecked=0, Total=25440 [2021-05-03 00:21:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 00:21:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-05-03 00:21:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:21:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-05-03 00:21:50,068 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 88 [2021-05-03 00:21:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:21:50,068 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-05-03 00:21:50,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 80 states have internal predecessors, (84), 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 00:21:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-05-03 00:21:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-03 00:21:50,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:21:50,068 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:21:50,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-03 00:21:50,068 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:21:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:21:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 737491778, now seen corresponding path program 76 times [2021-05-03 00:21:50,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:21:50,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924377153] [2021-05-03 00:21:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:21:50,078 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3084 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3084} OutVars{main_~z~0=v_main_~z~0_3084} AuxVars[] AssignedVars[] [2021-05-03 00:21:50,079 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:21:50,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:21:50,095 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:21:50,121 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:21:50,145 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:21:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:21:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:21:50,285 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 00:21:54,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:21:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924377153] [2021-05-03 00:21:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [924377153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:21:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:21:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-03 00:21:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282126956] [2021-05-03 00:21:54,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-03 00:21:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:21:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-03 00:21:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 00:21:54,307 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 00:22:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:22:04,706 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2021-05-03 00:22:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 00:22:04,707 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 89 [2021-05-03 00:22:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:22:04,708 INFO L225 Difference]: With dead ends: 191 [2021-05-03 00:22:04,708 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 00:22:04,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 9650.6ms TimeCoverageRelationStatistics Valid=633, Invalid=25449, Unknown=0, NotChecked=0, Total=26082 [2021-05-03 00:22:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 00:22:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-03 00:22:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:22:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-05-03 00:22:04,731 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 89 [2021-05-03 00:22:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:22:04,732 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-05-03 00:22:04,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 81 states have internal predecessors, (85), 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 00:22:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-05-03 00:22:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-03 00:22:04,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:22:04,732 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:22:04,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-03 00:22:04,732 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:22:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:22:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1413711202, now seen corresponding path program 77 times [2021-05-03 00:22:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:22:04,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160118466] [2021-05-03 00:22:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:22:04,737 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3163 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3163} OutVars{main_~z~0=v_main_~z~0_3163} AuxVars[] AssignedVars[] [2021-05-03 00:22:04,739 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:22:04,740 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:22:04,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:22:04,788 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:22:04,816 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:22:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:04,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:22:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:04,942 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 00:22:09,258 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:22:09,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160118466] [2021-05-03 00:22:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160118466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:22:09,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:22:09,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-03 00:22:09,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750601395] [2021-05-03 00:22:09,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-03 00:22:09,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:22:09,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-03 00:22:09,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 00:22:09,260 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 00:22:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:22:20,269 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2021-05-03 00:22:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-03 00:22:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 90 [2021-05-03 00:22:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:22:20,270 INFO L225 Difference]: With dead ends: 193 [2021-05-03 00:22:20,270 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 00:22:20,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 10163.9ms TimeCoverageRelationStatistics Valid=641, Invalid=26091, Unknown=0, NotChecked=0, Total=26732 [2021-05-03 00:22:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 00:22:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-05-03 00:22:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:22:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-05-03 00:22:20,289 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 90 [2021-05-03 00:22:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:22:20,289 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-05-03 00:22:20,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 82 states have internal predecessors, (86), 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 00:22:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-05-03 00:22:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-03 00:22:20,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:22:20,290 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:22:20,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-03 00:22:20,290 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:22:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:22:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash 901676866, now seen corresponding path program 78 times [2021-05-03 00:22:20,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:22:20,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619366560] [2021-05-03 00:22:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:22:20,295 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3243 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3243} OutVars{main_~z~0=v_main_~z~0_3243} AuxVars[] AssignedVars[] [2021-05-03 00:22:20,297 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:22:20,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:22:20,326 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:22:20,341 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:22:20,374 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:22:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:22:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:20,597 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 00:22:25,098 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:22:25,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619366560] [2021-05-03 00:22:25,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [619366560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:22:25,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:22:25,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-03 00:22:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669093439] [2021-05-03 00:22:25,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-03 00:22:25,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:22:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-03 00:22:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 00:22:25,100 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 00:22:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:22:36,417 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2021-05-03 00:22:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 00:22:36,418 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 91 [2021-05-03 00:22:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:22:36,419 INFO L225 Difference]: With dead ends: 195 [2021-05-03 00:22:36,419 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 00:22:36,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 10586.2ms TimeCoverageRelationStatistics Valid=649, Invalid=26741, Unknown=0, NotChecked=0, Total=27390 [2021-05-03 00:22:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 00:22:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-03 00:22:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:22:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-05-03 00:22:36,438 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 91 [2021-05-03 00:22:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:22:36,438 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-05-03 00:22:36,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 83 states have internal predecessors, (87), 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 00:22:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-05-03 00:22:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-03 00:22:36,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:22:36,439 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:22:36,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-03 00:22:36,440 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:22:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:22:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2086485662, now seen corresponding path program 79 times [2021-05-03 00:22:36,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:22:36,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541218324] [2021-05-03 00:22:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:22:36,445 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3324 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3324} OutVars{main_~z~0=v_main_~z~0_3324} AuxVars[] AssignedVars[] [2021-05-03 00:22:36,447 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:22:36,448 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:22:36,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:22:36,533 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:22:36,586 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:22:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:36,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:22:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:36,829 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 00:22:41,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:22:41,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541218324] [2021-05-03 00:22:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541218324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:22:41,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:22:41,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-03 00:22:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109839846] [2021-05-03 00:22:41,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-03 00:22:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:22:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-03 00:22:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 00:22:41,305 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 00:22:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:22:53,457 INFO L93 Difference]: Finished difference Result 197 states and 206 transitions. [2021-05-03 00:22:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 00:22:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 92 [2021-05-03 00:22:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:22:53,459 INFO L225 Difference]: With dead ends: 197 [2021-05-03 00:22:53,459 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 00:22:53,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 10911.5ms TimeCoverageRelationStatistics Valid=657, Invalid=27399, Unknown=0, NotChecked=0, Total=28056 [2021-05-03 00:22:53,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 00:22:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-05-03 00:22:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:22:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-05-03 00:22:53,470 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 92 [2021-05-03 00:22:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:22:53,470 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-05-03 00:22:53,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 84 states have internal predecessors, (88), 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 00:22:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-05-03 00:22:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-03 00:22:53,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:22:53,471 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:22:53,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-03 00:22:53,471 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:22:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:22:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -230243518, now seen corresponding path program 80 times [2021-05-03 00:22:53,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:22:53,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102025082] [2021-05-03 00:22:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:22:53,476 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3406 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3406} OutVars{main_~z~0=v_main_~z~0_3406} AuxVars[] AssignedVars[] [2021-05-03 00:22:53,494 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:22:53,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:22:53,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:22:53,543 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:22:53,584 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:22:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:53,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:22:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:22:53,703 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 00:22:58,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:22:58,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102025082] [2021-05-03 00:22:58,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102025082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:22:58,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:22:58,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-03 00:22:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110289075] [2021-05-03 00:22:58,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-03 00:22:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:22:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-03 00:22:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:22:58,587 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 00:23:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:23:11,272 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2021-05-03 00:23:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-03 00:23:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 93 [2021-05-03 00:23:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:23:11,273 INFO L225 Difference]: With dead ends: 199 [2021-05-03 00:23:11,273 INFO L226 Difference]: Without dead ends: 104 [2021-05-03 00:23:11,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 11499.8ms TimeCoverageRelationStatistics Valid=665, Invalid=28065, Unknown=0, NotChecked=0, Total=28730 [2021-05-03 00:23:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-03 00:23:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-03 00:23:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:23:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-05-03 00:23:11,283 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 93 [2021-05-03 00:23:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:23:11,284 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-05-03 00:23:11,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 85 states have internal predecessors, (89), 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 00:23:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-05-03 00:23:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-03 00:23:11,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:23:11,284 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:23:11,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-03 00:23:11,285 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:23:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:23:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1478688098, now seen corresponding path program 81 times [2021-05-03 00:23:11,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:23:11,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336636512] [2021-05-03 00:23:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:23:11,291 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3489 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3489} OutVars{main_~z~0=v_main_~z~0_3489} AuxVars[] AssignedVars[] [2021-05-03 00:23:11,318 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:23:11,319 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:23:11,339 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:23:11,397 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:23:11,473 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:23:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:11,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:23:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:11,782 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 00:23:17,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:23:17,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336636512] [2021-05-03 00:23:17,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [336636512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:23:17,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:23:17,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-03 00:23:17,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728298701] [2021-05-03 00:23:17,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-03 00:23:17,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:23:17,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-03 00:23:17,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 00:23:17,591 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 00:23:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:23:31,070 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-05-03 00:23:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 00:23:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 94 [2021-05-03 00:23:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:23:31,072 INFO L225 Difference]: With dead ends: 201 [2021-05-03 00:23:31,072 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 00:23:31,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3490 ImplicationChecksByTransitivity, 12907.1ms TimeCoverageRelationStatistics Valid=673, Invalid=28739, Unknown=0, NotChecked=0, Total=29412 [2021-05-03 00:23:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 00:23:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-05-03 00:23:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:23:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-05-03 00:23:31,093 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 94 [2021-05-03 00:23:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:23:31,093 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-05-03 00:23:31,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 86 states have internal predecessors, (90), 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 00:23:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-05-03 00:23:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:23:31,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:23:31,095 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:23:31,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-03 00:23:31,095 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:23:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:23:31,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1379006654, now seen corresponding path program 82 times [2021-05-03 00:23:31,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:23:31,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598071595] [2021-05-03 00:23:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:23:31,100 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3573 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3573} OutVars{main_~z~0=v_main_~z~0_3573} AuxVars[] AssignedVars[] [2021-05-03 00:23:31,102 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:23:31,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:23:31,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:23:31,157 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:23:31,191 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:23:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:31,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:23:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:31,507 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 00:23:37,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:23:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598071595] [2021-05-03 00:23:37,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598071595] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:23:37,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:23:37,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-03 00:23:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24043375] [2021-05-03 00:23:37,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-03 00:23:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:23:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-03 00:23:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:23:37,089 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 00:23:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:23:53,946 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2021-05-03 00:23:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-03 00:23:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 95 [2021-05-03 00:23:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:23:53,949 INFO L225 Difference]: With dead ends: 203 [2021-05-03 00:23:53,949 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 00:23:53,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3574 ImplicationChecksByTransitivity, 13771.5ms TimeCoverageRelationStatistics Valid=681, Invalid=29421, Unknown=0, NotChecked=0, Total=30102 [2021-05-03 00:23:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 00:23:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-03 00:23:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:23:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-05-03 00:23:53,961 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 95 [2021-05-03 00:23:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:23:53,962 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-05-03 00:23:53,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 87 states have internal predecessors, (91), 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 00:23:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-05-03 00:23:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-03 00:23:53,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:23:53,975 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:23:53,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-03 00:23:53,976 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:23:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:23:53,976 INFO L82 PathProgramCache]: Analyzing trace with hash 226769250, now seen corresponding path program 83 times [2021-05-03 00:23:53,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:23:53,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907799890] [2021-05-03 00:23:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:23:53,985 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3658 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3658} OutVars{main_~z~0=v_main_~z~0_3658} AuxVars[] AssignedVars[] [2021-05-03 00:23:53,988 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:23:54,011 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:23:54,054 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:23:54,095 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:23:54,170 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:23:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:54,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:23:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:23:54,439 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 00:24:06,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:24:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907799890] [2021-05-03 00:24:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [907799890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:24:06,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:24:06,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-03 00:24:06,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423237926] [2021-05-03 00:24:06,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-03 00:24:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:24:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-03 00:24:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2021-05-03 00:24:06,826 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 00:24:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:24:29,585 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2021-05-03 00:24:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 00:24:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 96 [2021-05-03 00:24:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:24:29,587 INFO L225 Difference]: With dead ends: 205 [2021-05-03 00:24:29,587 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 00:24:29,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3659 ImplicationChecksByTransitivity, 23613.7ms TimeCoverageRelationStatistics Valid=689, Invalid=30111, Unknown=0, NotChecked=0, Total=30800 [2021-05-03 00:24:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 00:24:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-05-03 00:24:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:24:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-05-03 00:24:29,597 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 96 [2021-05-03 00:24:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:24:29,597 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-05-03 00:24:29,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 88 states have internal predecessors, (92), 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 00:24:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-05-03 00:24:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-03 00:24:29,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:24:29,598 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:24:29,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-03 00:24:29,598 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:24:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:24:29,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1533785278, now seen corresponding path program 84 times [2021-05-03 00:24:29,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:24:29,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830513097] [2021-05-03 00:24:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:24:29,603 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3744 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3744} OutVars{main_~z~0=v_main_~z~0_3744} AuxVars[] AssignedVars[] [2021-05-03 00:24:29,604 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:24:29,605 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:24:29,629 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:24:29,659 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:24:29,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:24:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:24:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:24:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:24:29,887 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 00:24:35,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:24:35,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830513097] [2021-05-03 00:24:35,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [830513097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:24:35,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:24:35,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-03 00:24:35,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131076252] [2021-05-03 00:24:35,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-03 00:24:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:24:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-03 00:24:35,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 00:24:35,971 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 00:25:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:25:00,582 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2021-05-03 00:25:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-03 00:25:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 97 [2021-05-03 00:25:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:25:00,585 INFO L225 Difference]: With dead ends: 207 [2021-05-03 00:25:00,585 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 00:25:00,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 18295.8ms TimeCoverageRelationStatistics Valid=697, Invalid=30809, Unknown=0, NotChecked=0, Total=31506 [2021-05-03 00:25:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 00:25:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-03 00:25:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:25:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-05-03 00:25:00,595 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 97 [2021-05-03 00:25:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:25:00,595 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-05-03 00:25:00,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 89 states have internal predecessors, (93), 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 00:25:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-05-03 00:25:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-03 00:25:00,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:25:00,596 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:25:00,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-03 00:25:00,596 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:25:00,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:25:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash -276400798, now seen corresponding path program 85 times [2021-05-03 00:25:00,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:25:00,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829537324] [2021-05-03 00:25:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:25:00,602 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3831 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3831} OutVars{main_~z~0=v_main_~z~0_3831} AuxVars[] AssignedVars[] [2021-05-03 00:25:00,604 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:25:00,605 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:25:00,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:25:00,674 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:25:00,717 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:25:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:25:00,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:25:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:25:00,924 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 00:25:07,945 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:25:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829537324] [2021-05-03 00:25:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [829537324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:25:07,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:25:07,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-03 00:25:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371919267] [2021-05-03 00:25:07,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-03 00:25:07,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:25:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-03 00:25:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 00:25:07,947 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 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 00:25:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:25:42,257 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2021-05-03 00:25:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-03 00:25:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 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 98 [2021-05-03 00:25:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:25:42,259 INFO L225 Difference]: With dead ends: 209 [2021-05-03 00:25:42,259 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 00:25:42,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3832 ImplicationChecksByTransitivity, 23672.0ms TimeCoverageRelationStatistics Valid=705, Invalid=31515, Unknown=0, NotChecked=0, Total=32220 [2021-05-03 00:25:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 00:25:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-03 00:25:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:25:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-05-03 00:25:42,275 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 98 [2021-05-03 00:25:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:25:42,275 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-05-03 00:25:42,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 90 states have internal predecessors, (94), 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 00:25:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-05-03 00:25:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-03 00:25:42,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:25:42,275 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:25:42,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-03 00:25:42,276 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:25:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:25:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash 47812418, now seen corresponding path program 86 times [2021-05-03 00:25:42,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:25:42,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388746103] [2021-05-03 00:25:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:25:42,284 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_3919 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_3919} OutVars{main_~z~0=v_main_~z~0_3919} AuxVars[] AssignedVars[] [2021-05-03 00:25:42,286 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:25:42,287 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:25:42,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:25:42,341 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:25:42,376 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:25:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:25:42,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:25:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:25:42,562 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 00:25:50,030 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:25:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388746103] [2021-05-03 00:25:50,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388746103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:25:50,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:25:50,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-03 00:25:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500299558] [2021-05-03 00:25:50,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-03 00:25:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:25:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-03 00:25:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 00:25:50,032 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 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 00:26:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:13,637 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2021-05-03 00:26:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-03 00:26:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 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 99 [2021-05-03 00:26:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:13,639 INFO L225 Difference]: With dead ends: 211 [2021-05-03 00:26:13,639 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 00:26:13,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 19000.1ms TimeCoverageRelationStatistics Valid=713, Invalid=32229, Unknown=0, NotChecked=0, Total=32942 [2021-05-03 00:26:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 00:26:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-03 00:26:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:26:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-05-03 00:26:13,649 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 99 [2021-05-03 00:26:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:13,649 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-05-03 00:26:13,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 91 states have internal predecessors, (95), 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 00:26:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-05-03 00:26:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-03 00:26:13,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:13,650 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:13,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-03 00:26:13,650 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1508487522, now seen corresponding path program 87 times [2021-05-03 00:26:13,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:13,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967929400] [2021-05-03 00:26:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:13,655 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4008 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4008} OutVars{main_~z~0=v_main_~z~0_4008} AuxVars[] AssignedVars[] [2021-05-03 00:26:13,656 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:26:13,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:26:13,689 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:26:13,715 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:26:13,752 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:26:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:13,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:13,925 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 00:26:21,502 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967929400] [2021-05-03 00:26:21,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [967929400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:21,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:21,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-03 00:26:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813704677] [2021-05-03 00:26:21,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-03 00:26:21,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-03 00:26:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 00:26:21,504 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 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 00:26:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:26:44,401 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2021-05-03 00:26:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-03 00:26:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 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 100 [2021-05-03 00:26:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:26:44,403 INFO L225 Difference]: With dead ends: 213 [2021-05-03 00:26:44,403 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 00:26:44,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 18542.2ms TimeCoverageRelationStatistics Valid=721, Invalid=32951, Unknown=0, NotChecked=0, Total=33672 [2021-05-03 00:26:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 00:26:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-05-03 00:26:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:26:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-03 00:26:44,414 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 100 [2021-05-03 00:26:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:26:44,414 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-03 00:26:44,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 92 states have internal predecessors, (96), 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 00:26:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-03 00:26:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-03 00:26:44,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:26:44,415 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:26:44,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-03 00:26:44,415 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:26:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:26:44,415 INFO L82 PathProgramCache]: Analyzing trace with hash -455224510, now seen corresponding path program 88 times [2021-05-03 00:26:44,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:26:44,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365600616] [2021-05-03 00:26:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:26:44,421 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4098 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4098} OutVars{main_~z~0=v_main_~z~0_4098} AuxVars[] AssignedVars[] [2021-05-03 00:26:44,423 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:26:44,424 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:26:44,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:26:44,593 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:26:44,694 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:26:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:26:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:26:44,952 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 00:26:53,879 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:26:53,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365600616] [2021-05-03 00:26:53,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365600616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:26:53,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:26:53,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-03 00:26:53,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500789788] [2021-05-03 00:26:53,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-03 00:26:53,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:26:53,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-03 00:26:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 00:26:53,881 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 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 00:27:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:19,072 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2021-05-03 00:27:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-03 00:27:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 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 101 [2021-05-03 00:27:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:19,074 INFO L225 Difference]: With dead ends: 215 [2021-05-03 00:27:19,074 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 00:27:19,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 20816.3ms TimeCoverageRelationStatistics Valid=729, Invalid=33681, Unknown=0, NotChecked=0, Total=34410 [2021-05-03 00:27:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 00:27:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-03 00:27:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:27:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-05-03 00:27:19,084 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 101 [2021-05-03 00:27:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:19,084 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-05-03 00:27:19,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 93 states have internal predecessors, (97), 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 00:27:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-05-03 00:27:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-03 00:27:19,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:19,088 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:19,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-03 00:27:19,088 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1200755358, now seen corresponding path program 89 times [2021-05-03 00:27:19,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:19,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414265376] [2021-05-03 00:27:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:19,097 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4189 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4189} OutVars{main_~z~0=v_main_~z~0_4189} AuxVars[] AssignedVars[] [2021-05-03 00:27:19,099 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:27:19,100 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:27:19,134 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:27:19,177 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:27:19,248 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:27:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:19,504 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 00:27:28,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:27:28,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414265376] [2021-05-03 00:27:28,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [414265376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:27:28,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:27:28,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-03 00:27:28,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444003949] [2021-05-03 00:27:28,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-03 00:27:28,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:27:28,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-03 00:27:28,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2021-05-03 00:27:28,997 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 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 00:27:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:27:51,980 INFO L93 Difference]: Finished difference Result 217 states and 226 transitions. [2021-05-03 00:27:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-03 00:27:51,981 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 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 102 [2021-05-03 00:27:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:27:51,982 INFO L225 Difference]: With dead ends: 217 [2021-05-03 00:27:51,982 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 00:27:51,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 20497.8ms TimeCoverageRelationStatistics Valid=737, Invalid=34419, Unknown=0, NotChecked=0, Total=35156 [2021-05-03 00:27:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 00:27:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-05-03 00:27:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:27:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-05-03 00:27:51,992 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 102 [2021-05-03 00:27:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:27:51,992 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-05-03 00:27:51,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 94 states have internal predecessors, (98), 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 00:27:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-05-03 00:27:51,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-03 00:27:51,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:27:51,993 INFO L523 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:27:51,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-03 00:27:51,993 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:27:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:27:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1457592130, now seen corresponding path program 90 times [2021-05-03 00:27:51,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:27:51,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301250831] [2021-05-03 00:27:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:27:51,999 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4281 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4281} OutVars{main_~z~0=v_main_~z~0_4281} AuxVars[] AssignedVars[] [2021-05-03 00:27:52,000 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:27:52,002 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:27:52,028 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:27:52,073 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:27:52,117 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:27:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:27:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:27:52,386 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 00:28:03,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:03,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301250831] [2021-05-03 00:28:03,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301250831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:03,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:03,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-03 00:28:03,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949393413] [2021-05-03 00:28:03,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-03 00:28:03,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-03 00:28:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 00:28:03,744 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 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 00:28:31,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:28:31,238 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2021-05-03 00:28:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-03 00:28:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 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 103 [2021-05-03 00:28:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:28:31,241 INFO L225 Difference]: With dead ends: 219 [2021-05-03 00:28:31,241 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 00:28:31,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4282 ImplicationChecksByTransitivity, 23932.6ms TimeCoverageRelationStatistics Valid=745, Invalid=35165, Unknown=0, NotChecked=0, Total=35910 [2021-05-03 00:28:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 00:28:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-03 00:28:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:28:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-05-03 00:28:31,265 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 103 [2021-05-03 00:28:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:28:31,265 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-05-03 00:28:31,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 96 states have (on average 1.03125) internal successors, (99), 95 states have internal predecessors, (99), 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 00:28:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-05-03 00:28:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-03 00:28:31,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:28:31,266 INFO L523 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:28:31,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-03 00:28:31,266 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:28:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:28:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2032981662, now seen corresponding path program 91 times [2021-05-03 00:28:31,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:28:31,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497384638] [2021-05-03 00:28:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:28:31,280 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4374 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4374} OutVars{main_~z~0=v_main_~z~0_4374} AuxVars[] AssignedVars[] [2021-05-03 00:28:31,282 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:28:31,284 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:28:31,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:28:31,406 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:28:31,486 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:28:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:31,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:28:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:28:31,754 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 00:28:46,389 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:28:46,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497384638] [2021-05-03 00:28:46,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497384638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:28:46,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:28:46,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-03 00:28:46,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580737250] [2021-05-03 00:28:46,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-03 00:28:46,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:28:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-03 00:28:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2021-05-03 00:28:46,391 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 00:28:47,172 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 00:29:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:28,452 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2021-05-03 00:29:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 00:29:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 104 [2021-05-03 00:29:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:28,457 INFO L225 Difference]: With dead ends: 221 [2021-05-03 00:29:28,457 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 00:29:28,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4375 ImplicationChecksByTransitivity, 33189.8ms TimeCoverageRelationStatistics Valid=753, Invalid=35919, Unknown=0, NotChecked=0, Total=36672 [2021-05-03 00:29:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 00:29:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-03 00:29:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:29:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-05-03 00:29:28,481 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 104 [2021-05-03 00:29:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:28,481 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-05-03 00:29:28,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 00:29:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-05-03 00:29:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-03 00:29:28,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:28,485 INFO L523 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:28,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-03 00:29:28,485 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:28,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1428380482, now seen corresponding path program 92 times [2021-05-03 00:29:28,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:28,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655033477] [2021-05-03 00:29:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:28,509 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~z~0_4468 4294967296) 268435455) InVars {main_~z~0=v_main_~z~0_4468} OutVars{main_~z~0=v_main_~z~0_4468} AuxVars[] AssignedVars[] [2021-05-03 00:29:28,511 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size [2021-05-03 00:29:28,513 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:29:28,591 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-03 00:29:28,706 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.2 percent of original size 55 [2021-05-03 00:29:28,894 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 00:29:28,906 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:29:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:29,154 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 00:29:29,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.