/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:17:04,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:17:04,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:17:04,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:17:04,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:17:04,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:17:04,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:17:04,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:17:04,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:17:04,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:17:04,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:17:04,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:17:04,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:17:04,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:17:04,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:17:04,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:17:04,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:17:04,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:17:04,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:17:04,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:17:04,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:17:04,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:17:04,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:17:04,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:17:04,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:17:04,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:17:04,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:17:04,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:17:04,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:17:04,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:17:04,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:17:04,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:17:04,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:17:04,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:17:04,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:17:04,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:17:04,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:17:04,133 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:17:04,134 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:17:04,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:17:04,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:17:04,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:17:04,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:17:04,422 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:17:04,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2021-05-02 23:17:04,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff9c1e4d/132f79fddc2547b7a827565a13b03caa/FLAGd61b2ab7a [2021-05-02 23:17:04,765 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:17:04,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2021-05-02 23:17:04,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff9c1e4d/132f79fddc2547b7a827565a13b03caa/FLAGd61b2ab7a [2021-05-02 23:17:05,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff9c1e4d/132f79fddc2547b7a827565a13b03caa [2021-05-02 23:17:05,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:17:05,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:17:05,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:17:05,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:17:05,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:17:05,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a762d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05, skipping insertion in model container [2021-05-02 23:17:05,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:17:05,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:17:05,321 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c[325,338] [2021-05-02 23:17:05,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:17:05,332 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:17:05,339 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c[325,338] [2021-05-02 23:17:05,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:17:05,349 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:17:05,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05 WrapperNode [2021-05-02 23:17:05,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:17:05,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:17:05,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:17:05,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:17:05,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... [2021-05-02 23:17:05,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:17:05,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:17:05,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:17:05,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:17:05,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-05-02 23:17:05,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:17:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:17:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:17:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:17:05,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:17:05,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:17:05,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:17:05,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:17:05 BoogieIcfgContainer [2021-05-02 23:17:05,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:17:05,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:17:05,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:17:05,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:17:05,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:17:05" (1/3) ... [2021-05-02 23:17:05,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef8185a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:17:05, skipping insertion in model container [2021-05-02 23:17:05,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:17:05" (2/3) ... [2021-05-02 23:17:05,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef8185a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:17:05, skipping insertion in model container [2021-05-02 23:17:05,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:17:05" (3/3) ... [2021-05-02 23:17:05,630 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2021-05-02 23:17:05,634 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:17:05,636 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:17:05,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:17:05,659 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:17:05,659 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:17:05,659 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:17:05,659 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:17:05,659 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:17:05,659 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:17:05,660 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:17:05,660 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:17:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:17:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:17:05,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,673 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2021-05-02 23:17:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941824114] [2021-05-02 23:17:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:05,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:05,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941824114] [2021-05-02 23:17:05,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941824114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:05,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:05,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:17:05,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132504715] [2021-05-02 23:17:05,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:17:05,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:17:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:17:05,846 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:05,932 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:17:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:17:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:17:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:05,939 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:17:05,939 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:17:05,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:17:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:17:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:17:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:17:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:17:05,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-05-02 23:17:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:05,978 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:17:05,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:17:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:17:05,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,980 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:17:05,981 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2021-05-02 23:17:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932442865] [2021-05-02 23:17:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,994 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932442865] [2021-05-02 23:17:06,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932442865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:17:06,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105007640] [2021-05-02 23:17:06,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:17:06,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:17:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:17:06,139 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,220 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-05-02 23:17:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:17:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:17:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,225 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:17:06,225 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:17:06,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:17:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:17:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-05-02 23:17:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:17:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:17:06,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2021-05-02 23:17:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,232 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:17:06,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:17:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:17:06,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,233 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:17:06,233 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2021-05-02 23:17:06,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567597772] [2021-05-02 23:17:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,269 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_11 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_11} OutVars{main_~x~0=v_main_~x~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:17:06,286 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:06,309 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:06,418 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:06,457 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:06,508 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,697 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567597772] [2021-05-02 23:17:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567597772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:17:06,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651089244] [2021-05-02 23:17:06,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:17:06,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:17:06,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:17:06,699 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:17:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,902 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-05-02 23:17:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:17:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 23:17:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,903 INFO L225 Difference]: With dead ends: 31 [2021-05-02 23:17:06,903 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:17:06,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:17:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:17:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-05-02 23:17:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:17:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 23:17:06,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2021-05-02 23:17:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,909 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 23:17:06,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:17:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 23:17:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:17:06,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,909 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:17:06,910 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 2 times [2021-05-02 23:17:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177613752] [2021-05-02 23:17:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_17 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_17} OutVars{main_~x~0=v_main_~x~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:17:06,920 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:06,922 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:07,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:07,049 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:07,140 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:07,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177613752] [2021-05-02 23:17:07,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177613752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:07,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:07,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:17:07,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349599208] [2021-05-02 23:17:07,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:17:07,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:07,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:17:07,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:17:07,383 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:17:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:07,752 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-05-02 23:17:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:17:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2021-05-02 23:17:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:07,754 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:17:07,755 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:17:07,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:17:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:17:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 23:17:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:17:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 23:17:07,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2021-05-02 23:17:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:07,761 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 23:17:07,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:17:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 23:17:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:17:07,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:07,762 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:07,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:17:07,763 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 3 times [2021-05-02 23:17:07,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:07,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963378011] [2021-05-02 23:17:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:07,787 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_25 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_25} OutVars{main_~x~0=v_main_~x~0_25} AuxVars[] AssignedVars[] [2021-05-02 23:17:07,791 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:07,793 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:07,881 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:07,926 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:07,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:08,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963378011] [2021-05-02 23:17:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963378011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:17:08,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559466497] [2021-05-02 23:17:08,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:17:08,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:17:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:17:08,297 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 20 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:17:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:08,702 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 23:17:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:17:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-05-02 23:17:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:08,704 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:17:08,704 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:17:08,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:17:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:17:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 23:17:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:17:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-02 23:17:08,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2021-05-02 23:17:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,710 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-02 23:17:08,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:17:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-02 23:17:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:17:08,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,711 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:17:08,711 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 4 times [2021-05-02 23:17:08,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49811969] [2021-05-02 23:17:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,717 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_35 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_35} OutVars{main_~x~0=v_main_~x~0_35} AuxVars[] AssignedVars[] [2021-05-02 23:17:08,719 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:08,720 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:08,808 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:08,895 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:08,925 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:09,270 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:09,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49811969] [2021-05-02 23:17:09,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [49811969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:09,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:09,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:17:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162975310] [2021-05-02 23:17:09,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:17:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:09,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:17:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:17:09,271 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 24 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:17:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:09,814 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-05-02 23:17:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:17:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2021-05-02 23:17:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:09,816 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:17:09,816 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:17:09,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:17:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:17:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-05-02 23:17:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:17:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-02 23:17:09,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2021-05-02 23:17:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:09,823 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-02 23:17:09,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:17:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-02 23:17:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:17:09,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:09,824 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:09,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:17:09,824 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 5 times [2021-05-02 23:17:09,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:09,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913446247] [2021-05-02 23:17:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:09,830 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_47 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_47} OutVars{main_~x~0=v_main_~x~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:17:09,834 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:09,843 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:09,995 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:10,024 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:10,061 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:10,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913446247] [2021-05-02 23:17:10,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913446247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:17:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165356657] [2021-05-02 23:17:10,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:17:10,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:17:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:17:10,484 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 28 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:17:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,157 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-05-02 23:17:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:17:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2021-05-02 23:17:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,158 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:17:11,158 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:17:11,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 794.5ms TimeCoverageRelationStatistics Valid=194, Invalid=2158, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:17:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:17:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 23:17:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:17:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-02 23:17:11,165 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 41 [2021-05-02 23:17:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,165 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-02 23:17:11,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 16 states have internal predecessors, (27), 7 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:17:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-02 23:17:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:17:11,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,166 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:17:11,166 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 6 times [2021-05-02 23:17:11,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465783637] [2021-05-02 23:17:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,171 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_61 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_61} OutVars{main_~x~0=v_main_~x~0_61} AuxVars[] AssignedVars[] [2021-05-02 23:17:11,173 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:11,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:11,230 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:11,278 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:11,342 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:11,840 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465783637] [2021-05-02 23:17:11,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465783637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:11,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:11,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:17:11,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57675035] [2021-05-02 23:17:11,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:17:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:17:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:17:11,842 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 32 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:17:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:12,685 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-02 23:17:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:17:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2021-05-02 23:17:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:12,686 INFO L225 Difference]: With dead ends: 61 [2021-05-02 23:17:12,686 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:17:12,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=228, Invalid=2964, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:17:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:17:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-05-02 23:17:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-02 23:17:12,695 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 47 [2021-05-02 23:17:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:12,695 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-02 23:17:12,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:17:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-02 23:17:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:17:12,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:12,696 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:12,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:17:12,696 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 7 times [2021-05-02 23:17:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:12,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074167657] [2021-05-02 23:17:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:12,704 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_77 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_77} OutVars{main_~x~0=v_main_~x~0_77} AuxVars[] AssignedVars[] [2021-05-02 23:17:12,706 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:12,713 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:12,801 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:12,835 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:12,870 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:13,537 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:13,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074167657] [2021-05-02 23:17:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074167657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:13,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:13,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:17:13,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622639815] [2021-05-02 23:17:13,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:17:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:17:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:17:13,539 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 36 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:14,604 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-05-02 23:17:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:17:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2021-05-02 23:17:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:14,606 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:17:14,606 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:17:14,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1254.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3898, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:17:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 23:17:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-02 23:17:14,613 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 53 [2021-05-02 23:17:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:14,614 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-02 23:17:14,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:17:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-02 23:17:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:17:14,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:14,614 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:14,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:17:14,615 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 8 times [2021-05-02 23:17:14,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:14,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413805099] [2021-05-02 23:17:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:14,619 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_95 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_95} OutVars{main_~x~0=v_main_~x~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:17:14,621 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:14,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:14,699 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:14,740 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:14,788 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:15,537 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413805099] [2021-05-02 23:17:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [413805099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:17:15,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149828644] [2021-05-02 23:17:15,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:17:15,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:17:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:17:15,541 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 40 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 22 states have internal predecessors, (39), 10 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:16,753 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-05-02 23:17:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:17:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 22 states have internal predecessors, (39), 10 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2021-05-02 23:17:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:16,754 INFO L225 Difference]: With dead ends: 73 [2021-05-02 23:17:16,754 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 23:17:16,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1450.0ms TimeCoverageRelationStatistics Valid=296, Invalid=4960, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 23:17:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 23:17:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:17:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-02 23:17:16,763 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 59 [2021-05-02 23:17:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:16,763 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-02 23:17:16,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 22 states have internal predecessors, (39), 10 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:17:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-02 23:17:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:17:16,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:16,764 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:16,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:17:16,764 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:16,764 INFO L82 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 9 times [2021-05-02 23:17:16,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:16,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58534498] [2021-05-02 23:17:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:16,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_115 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_115} OutVars{main_~x~0=v_main_~x~0_115} AuxVars[] AssignedVars[] [2021-05-02 23:17:16,770 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:16,777 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:16,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:16,859 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:16,888 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:17,727 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58534498] [2021-05-02 23:17:17,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [58534498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:17:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626814180] [2021-05-02 23:17:17,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:17:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:17:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:17:17,729 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 44 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 24 states have internal predecessors, (43), 11 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:17:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:19,246 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-05-02 23:17:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:17:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 24 states have internal predecessors, (43), 11 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2021-05-02 23:17:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:19,248 INFO L225 Difference]: With dead ends: 79 [2021-05-02 23:17:19,248 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:17:19,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 1806.0ms TimeCoverageRelationStatistics Valid=330, Invalid=6150, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:17:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-05-02 23:17:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:17:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-02 23:17:19,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 65 [2021-05-02 23:17:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:19,257 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-02 23:17:19,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 24 states have internal predecessors, (43), 11 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:17:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-02 23:17:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:17:19,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:19,258 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:19,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:17:19,258 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 10 times [2021-05-02 23:17:19,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:19,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902323186] [2021-05-02 23:17:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:19,264 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_137 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_137} OutVars{main_~x~0=v_main_~x~0_137} AuxVars[] AssignedVars[] [2021-05-02 23:17:19,265 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:19,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:19,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:19,378 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:19,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:20,401 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:20,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902323186] [2021-05-02 23:17:20,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [902323186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:20,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:20,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:17:20,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550750054] [2021-05-02 23:17:20,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:17:20,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:20,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:17:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:17:20,403 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 26 states have internal predecessors, (47), 12 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:17:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,152 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-02 23:17:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:17:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 26 states have internal predecessors, (47), 12 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 71 [2021-05-02 23:17:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,154 INFO L225 Difference]: With dead ends: 85 [2021-05-02 23:17:22,154 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:17:22,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 1969.6ms TimeCoverageRelationStatistics Valid=364, Invalid=7468, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:17:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:17:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-05-02 23:17:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:17:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-02 23:17:22,164 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 71 [2021-05-02 23:17:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,164 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-02 23:17:22,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 26 states have internal predecessors, (47), 12 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:17:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-02 23:17:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:17:22,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,165 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:17:22,165 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 11 times [2021-05-02 23:17:22,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186210090] [2021-05-02 23:17:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,170 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_161 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_161} OutVars{main_~x~0=v_main_~x~0_161} AuxVars[] AssignedVars[] [2021-05-02 23:17:22,172 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:22,173 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:22,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:22,290 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:22,338 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:23,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:23,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186210090] [2021-05-02 23:17:23,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [186210090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:17:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486025241] [2021-05-02 23:17:23,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:17:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:17:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:17:23,611 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 52 states, 50 states have (on average 1.02) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:17:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:25,530 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-05-02 23:17:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:17:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.02) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 77 [2021-05-02 23:17:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:25,532 INFO L225 Difference]: With dead ends: 91 [2021-05-02 23:17:25,532 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:17:25,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 26 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 2444.8ms TimeCoverageRelationStatistics Valid=398, Invalid=8914, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:17:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:17:25,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 23:17:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:17:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-02 23:17:25,542 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 77 [2021-05-02 23:17:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:25,542 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-02 23:17:25,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 50 states have (on average 1.02) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:17:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-02 23:17:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:17:25,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:25,543 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:25,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:17:25,544 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 12 times [2021-05-02 23:17:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:25,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059220736] [2021-05-02 23:17:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:25,548 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_187 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_187} OutVars{main_~x~0=v_main_~x~0_187} AuxVars[] AssignedVars[] [2021-05-02 23:17:25,549 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:25,556 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:25,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:25,683 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:25,734 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:26,937 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059220736] [2021-05-02 23:17:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059220736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:26,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:26,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:17:26,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079175795] [2021-05-02 23:17:26,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:17:26,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:26,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:17:26,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:17:26,939 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 56 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 30 states have internal predecessors, (55), 14 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:17:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:29,062 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-05-02 23:17:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:17:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 30 states have internal predecessors, (55), 14 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 83 [2021-05-02 23:17:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:29,063 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:17:29,064 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:17:29,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 2419.8ms TimeCoverageRelationStatistics Valid=432, Invalid=10488, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:17:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:17:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-05-02 23:17:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:17:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-02 23:17:29,074 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 83 [2021-05-02 23:17:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:29,074 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-02 23:17:29,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 30 states have internal predecessors, (55), 14 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:17:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-02 23:17:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:17:29,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:29,075 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:29,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:17:29,075 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 13 times [2021-05-02 23:17:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:29,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714412975] [2021-05-02 23:17:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:29,083 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_215 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_215} OutVars{main_~x~0=v_main_~x~0_215} AuxVars[] AssignedVars[] [2021-05-02 23:17:29,084 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:29,089 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:29,228 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:29,267 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:29,328 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:30,743 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:30,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714412975] [2021-05-02 23:17:30,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [714412975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:30,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:30,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:17:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274369988] [2021-05-02 23:17:30,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:17:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:17:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:30,744 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 60 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:17:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:32,905 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-05-02 23:17:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:17:32,905 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 89 [2021-05-02 23:17:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:32,906 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:17:32,906 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 23:17:32,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 30 SyntacticMatches, 13 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 2718.3ms TimeCoverageRelationStatistics Valid=466, Invalid=12190, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:17:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 23:17:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-05-02 23:17:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:17:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-02 23:17:32,918 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 89 [2021-05-02 23:17:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:32,918 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-02 23:17:32,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:17:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-02 23:17:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:17:32,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:32,919 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:32,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:17:32,920 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 14 times [2021-05-02 23:17:32,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:32,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740795627] [2021-05-02 23:17:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:32,924 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_245 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_245} OutVars{main_~x~0=v_main_~x~0_245} AuxVars[] AssignedVars[] [2021-05-02 23:17:32,926 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:32,932 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:33,073 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 23:17:33,099 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:33,133 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:33,202 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:34,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:34,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740795627] [2021-05-02 23:17:34,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740795627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:34,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:34,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:34,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977650431] [2021-05-02 23:17:34,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:34,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:34,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:34,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:34,825 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 64 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 34 states have internal predecessors, (63), 16 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:17:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:37,108 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-05-02 23:17:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:17:37,108 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 34 states have internal predecessors, (63), 16 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 95 [2021-05-02 23:17:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:37,109 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:17:37,109 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:17:37,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4835 ImplicationChecksByTransitivity, 2960.7ms TimeCoverageRelationStatistics Valid=500, Invalid=14020, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:17:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:17:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2021-05-02 23:17:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:17:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-02 23:17:37,119 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 95 [2021-05-02 23:17:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:37,119 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-02 23:17:37,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 34 states have internal predecessors, (63), 16 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:17:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-02 23:17:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:17:37,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:37,120 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:37,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:17:37,120 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 15 times [2021-05-02 23:17:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084610387] [2021-05-02 23:17:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:37,126 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_277 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_277} OutVars{main_~x~0=v_main_~x~0_277} AuxVars[] AssignedVars[] [2021-05-02 23:17:37,127 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:37,128 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:37,211 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:37,247 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:37,284 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:39,116 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084610387] [2021-05-02 23:17:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084610387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:39,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:39,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816637203] [2021-05-02 23:17:39,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:39,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:39,118 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 68 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:17:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:41,840 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2021-05-02 23:17:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 101 [2021-05-02 23:17:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:41,841 INFO L225 Difference]: With dead ends: 115 [2021-05-02 23:17:41,841 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 23:17:41,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 16 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 3472.6ms TimeCoverageRelationStatistics Valid=534, Invalid=15978, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:17:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 23:17:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-05-02 23:17:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-05-02 23:17:41,874 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 101 [2021-05-02 23:17:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,874 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-05-02 23:17:41,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 36 states have internal predecessors, (67), 17 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:17:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-05-02 23:17:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:17:41,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,875 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:17:41,875 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 16 times [2021-05-02 23:17:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951184608] [2021-05-02 23:17:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,882 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_311 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_311} OutVars{main_~x~0=v_main_~x~0_311} AuxVars[] AssignedVars[] [2021-05-02 23:17:41,885 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:41,886 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:41,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:42,015 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:42,065 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:44,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:44,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951184608] [2021-05-02 23:17:44,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [951184608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:44,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:44,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:44,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708171078] [2021-05-02 23:17:44,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:44,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:44,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:44,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:44,211 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 72 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 38 states have internal predecessors, (71), 18 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:47,390 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-05-02 23:17:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 38 states have internal predecessors, (71), 18 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 107 [2021-05-02 23:17:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:47,392 INFO L225 Difference]: With dead ends: 121 [2021-05-02 23:17:47,392 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 23:17:47,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 36 SyntacticMatches, 17 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6293 ImplicationChecksByTransitivity, 4030.2ms TimeCoverageRelationStatistics Valid=568, Invalid=18064, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:17:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 23:17:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-05-02 23:17:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:17:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2021-05-02 23:17:47,422 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 107 [2021-05-02 23:17:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:47,423 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2021-05-02 23:17:47,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 38 states have internal predecessors, (71), 18 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:17:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2021-05-02 23:17:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:17:47,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:47,423 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:47,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:17:47,424 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:47,424 INFO L82 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 17 times [2021-05-02 23:17:47,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:47,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158131680] [2021-05-02 23:17:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:47,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_347 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_347} OutVars{main_~x~0=v_main_~x~0_347} AuxVars[] AssignedVars[] [2021-05-02 23:17:47,433 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:47,435 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:47,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:47,563 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:47,609 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:49,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158131680] [2021-05-02 23:17:49,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [158131680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:49,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070766624] [2021-05-02 23:17:49,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:49,903 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 76 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 40 states have internal predecessors, (75), 19 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:17:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:52,546 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-05-02 23:17:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 40 states have internal predecessors, (75), 19 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 113 [2021-05-02 23:17:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:52,547 INFO L225 Difference]: With dead ends: 127 [2021-05-02 23:17:52,547 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:17:52,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 38 SyntacticMatches, 18 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7094 ImplicationChecksByTransitivity, 3728.5ms TimeCoverageRelationStatistics Valid=602, Invalid=20278, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:17:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:17:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-05-02 23:17:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:17:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2021-05-02 23:17:52,559 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 113 [2021-05-02 23:17:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2021-05-02 23:17:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 40 states have internal predecessors, (75), 19 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:17:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2021-05-02 23:17:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:17:52,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:52,560 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:52,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:17:52,560 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 18 times [2021-05-02 23:17:52,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:52,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799341016] [2021-05-02 23:17:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:52,565 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_385 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_385} OutVars{main_~x~0=v_main_~x~0_385} AuxVars[] AssignedVars[] [2021-05-02 23:17:52,566 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:52,567 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:52,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:52,676 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:52,748 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:55,384 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:55,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799341016] [2021-05-02 23:17:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [799341016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:55,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:55,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:17:55,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307167992] [2021-05-02 23:17:55,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:17:55,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:17:55,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:55,386 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 80 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 42 states have internal predecessors, (79), 20 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:17:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:59,124 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-05-02 23:17:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 42 states have internal predecessors, (79), 20 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 119 [2021-05-02 23:17:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:59,128 INFO L225 Difference]: With dead ends: 133 [2021-05-02 23:17:59,128 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 23:17:59,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 40 SyntacticMatches, 19 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7943 ImplicationChecksByTransitivity, 4834.8ms TimeCoverageRelationStatistics Valid=636, Invalid=22620, Unknown=0, NotChecked=0, Total=23256 [2021-05-02 23:17:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 23:17:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 23:17:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:17:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2021-05-02 23:17:59,146 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 119 [2021-05-02 23:17:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:59,146 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2021-05-02 23:17:59,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 42 states have internal predecessors, (79), 20 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:17:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2021-05-02 23:17:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:17:59,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:59,147 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:59,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:17:59,147 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:59,147 INFO L82 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 19 times [2021-05-02 23:17:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:59,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120936545] [2021-05-02 23:17:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:59,154 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_425 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_425} OutVars{main_~x~0=v_main_~x~0_425} AuxVars[] AssignedVars[] [2021-05-02 23:17:59,155 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:17:59,161 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:17:59,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:17:59,281 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:17:59,332 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:17:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:59,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:02,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:02,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120936545] [2021-05-02 23:18:02,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120936545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:02,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:02,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:18:02,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594673653] [2021-05-02 23:18:02,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:18:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:18:02,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:02,244 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 84 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 44 states have internal predecessors, (83), 21 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:18:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:06,633 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2021-05-02 23:18:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:18:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 44 states have internal predecessors, (83), 21 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 125 [2021-05-02 23:18:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:06,634 INFO L225 Difference]: With dead ends: 139 [2021-05-02 23:18:06,634 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:18:06,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 42 SyntacticMatches, 20 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8840 ImplicationChecksByTransitivity, 5339.3ms TimeCoverageRelationStatistics Valid=670, Invalid=25090, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 23:18:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:18:06,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-05-02 23:18:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:18:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2021-05-02 23:18:06,649 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 125 [2021-05-02 23:18:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:06,649 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2021-05-02 23:18:06,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 44 states have internal predecessors, (83), 21 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:18:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2021-05-02 23:18:06,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:18:06,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:06,650 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:06,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:18:06,650 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 20 times [2021-05-02 23:18:06,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:06,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657595899] [2021-05-02 23:18:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:06,667 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_467 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_467} OutVars{main_~x~0=v_main_~x~0_467} AuxVars[] AssignedVars[] [2021-05-02 23:18:06,668 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:06,669 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:06,771 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:06,849 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:06,900 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:09,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:09,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657595899] [2021-05-02 23:18:09,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [657595899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:09,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:09,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:09,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351298530] [2021-05-02 23:18:09,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:09,647 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 88 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 46 states have internal predecessors, (87), 22 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:18:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:13,928 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-05-02 23:18:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:18:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 46 states have internal predecessors, (87), 22 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 131 [2021-05-02 23:18:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:13,931 INFO L225 Difference]: With dead ends: 145 [2021-05-02 23:18:13,932 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 23:18:13,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 44 SyntacticMatches, 21 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9785 ImplicationChecksByTransitivity, 5064.7ms TimeCoverageRelationStatistics Valid=704, Invalid=27688, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 23:18:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 23:18:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-05-02 23:18:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:18:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2021-05-02 23:18:13,959 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 131 [2021-05-02 23:18:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:13,959 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2021-05-02 23:18:13,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 46 states have internal predecessors, (87), 22 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:18:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2021-05-02 23:18:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:18:13,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:13,960 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:13,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:18:13,960 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 21 times [2021-05-02 23:18:13,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:13,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657874982] [2021-05-02 23:18:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:13,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_511 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_511} OutVars{main_~x~0=v_main_~x~0_511} AuxVars[] AssignedVars[] [2021-05-02 23:18:13,967 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:13,973 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:14,043 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:14,079 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:14,131 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:17,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:17,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657874982] [2021-05-02 23:18:17,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657874982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:17,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:17,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:17,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568868738] [2021-05-02 23:18:17,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:17,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:17,624 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 92 states, 90 states have (on average 1.011111111111111) internal successors, (91), 48 states have internal predecessors, (91), 23 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:18:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:22,498 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2021-05-02 23:18:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 1.011111111111111) internal successors, (91), 48 states have internal predecessors, (91), 23 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 137 [2021-05-02 23:18:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:22,499 INFO L225 Difference]: With dead ends: 151 [2021-05-02 23:18:22,499 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 23:18:22,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 46 SyntacticMatches, 21 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10778 ImplicationChecksByTransitivity, 6305.8ms TimeCoverageRelationStatistics Valid=738, Invalid=30414, Unknown=0, NotChecked=0, Total=31152 [2021-05-02 23:18:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 23:18:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-05-02 23:18:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:18:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-05-02 23:18:22,525 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 137 [2021-05-02 23:18:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:22,526 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-05-02 23:18:22,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 90 states have (on average 1.011111111111111) internal successors, (91), 48 states have internal predecessors, (91), 23 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:18:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-05-02 23:18:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:18:22,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:22,538 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:22,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:18:22,538 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 22 times [2021-05-02 23:18:22,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:22,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194289798] [2021-05-02 23:18:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:22,544 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_557 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_557} OutVars{main_~x~0=v_main_~x~0_557} AuxVars[] AssignedVars[] [2021-05-02 23:18:22,546 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:22,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:22,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:22,654 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:22,693 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:22,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:26,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:26,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194289798] [2021-05-02 23:18:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [194289798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:18:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598369268] [2021-05-02 23:18:26,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:18:26,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:18:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:26,704 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 96 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 50 states have internal predecessors, (95), 24 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:18:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:32,254 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-05-02 23:18:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 50 states have internal predecessors, (95), 24 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 143 [2021-05-02 23:18:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:32,255 INFO L225 Difference]: With dead ends: 157 [2021-05-02 23:18:32,255 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 23:18:32,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 48 SyntacticMatches, 22 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11819 ImplicationChecksByTransitivity, 7188.2ms TimeCoverageRelationStatistics Valid=772, Invalid=33268, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 23:18:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 23:18:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 23:18:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:18:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2021-05-02 23:18:32,272 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 143 [2021-05-02 23:18:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:32,272 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2021-05-02 23:18:32,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 50 states have internal predecessors, (95), 24 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:18:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2021-05-02 23:18:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:18:32,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:32,273 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:32,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:18:32,273 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 23 times [2021-05-02 23:18:32,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:32,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793447140] [2021-05-02 23:18:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:32,278 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_605 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_605} OutVars{main_~x~0=v_main_~x~0_605} AuxVars[] AssignedVars[] [2021-05-02 23:18:32,279 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:32,287 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:32,391 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:32,422 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:32,510 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:36,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793447140] [2021-05-02 23:18:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [793447140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:36,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:36,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:18:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584541751] [2021-05-02 23:18:36,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:18:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:18:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:36,700 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 100 states, 98 states have (on average 1.010204081632653) internal successors, (99), 52 states have internal predecessors, (99), 25 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:18:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:42,446 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2021-05-02 23:18:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:18:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 98 states have (on average 1.010204081632653) internal successors, (99), 52 states have internal predecessors, (99), 25 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 149 [2021-05-02 23:18:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:42,451 INFO L225 Difference]: With dead ends: 163 [2021-05-02 23:18:42,451 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 23:18:42,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 50 SyntacticMatches, 23 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12908 ImplicationChecksByTransitivity, 7555.3ms TimeCoverageRelationStatistics Valid=806, Invalid=36250, Unknown=0, NotChecked=0, Total=37056 [2021-05-02 23:18:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 23:18:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-05-02 23:18:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:18:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2021-05-02 23:18:42,480 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 149 [2021-05-02 23:18:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:42,480 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2021-05-02 23:18:42,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 98 states have (on average 1.010204081632653) internal successors, (99), 52 states have internal predecessors, (99), 25 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:18:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2021-05-02 23:18:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:18:42,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:42,482 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:42,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:18:42,482 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 24 times [2021-05-02 23:18:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655753963] [2021-05-02 23:18:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:42,488 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_655 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_655} OutVars{main_~x~0=v_main_~x~0_655} AuxVars[] AssignedVars[] [2021-05-02 23:18:42,493 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:42,493 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:42,583 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:42,661 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:42,709 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:47,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:47,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655753963] [2021-05-02 23:18:47,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655753963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:47,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:47,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:18:47,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938793910] [2021-05-02 23:18:47,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:18:47,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:18:47,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:18:47,550 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 104 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 54 states have internal predecessors, (103), 26 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:18:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:53,900 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2021-05-02 23:18:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:18:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 54 states have internal predecessors, (103), 26 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 155 [2021-05-02 23:18:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:53,901 INFO L225 Difference]: With dead ends: 169 [2021-05-02 23:18:53,901 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:18:53,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 52 SyntacticMatches, 25 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14045 ImplicationChecksByTransitivity, 8471.2ms TimeCoverageRelationStatistics Valid=840, Invalid=39360, Unknown=0, NotChecked=0, Total=40200 [2021-05-02 23:18:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:18:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-05-02 23:18:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 23:18:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-05-02 23:18:53,922 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 155 [2021-05-02 23:18:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:53,922 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-05-02 23:18:53,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 54 states have internal predecessors, (103), 26 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:18:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-05-02 23:18:53,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:18:53,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:53,923 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:53,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:18:53,923 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 25 times [2021-05-02 23:18:53,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:53,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38455464] [2021-05-02 23:18:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:53,931 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_707 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_707} OutVars{main_~x~0=v_main_~x~0_707} AuxVars[] AssignedVars[] [2021-05-02 23:18:53,933 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:18:53,941 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:18:54,086 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:18:54,207 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:18:54,269 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:18:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:59,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38455464] [2021-05-02 23:18:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [38455464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:59,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:59,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:18:59,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322076297] [2021-05-02 23:18:59,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:18:59,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:18:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11239, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:18:59,641 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 108 states, 106 states have (on average 1.009433962264151) internal successors, (107), 56 states have internal predecessors, (107), 27 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 23:19:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:06,672 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2021-05-02 23:19:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 106 states have (on average 1.009433962264151) internal successors, (107), 56 states have internal predecessors, (107), 27 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 161 [2021-05-02 23:19:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:06,674 INFO L225 Difference]: With dead ends: 175 [2021-05-02 23:19:06,674 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:19:06,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 54 SyntacticMatches, 26 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15230 ImplicationChecksByTransitivity, 9402.1ms TimeCoverageRelationStatistics Valid=874, Invalid=42598, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 23:19:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:19:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-05-02 23:19:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:19:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2021-05-02 23:19:06,709 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 161 [2021-05-02 23:19:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:06,709 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2021-05-02 23:19:06,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 106 states have (on average 1.009433962264151) internal successors, (107), 56 states have internal predecessors, (107), 27 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 23:19:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2021-05-02 23:19:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:19:06,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:06,710 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:06,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:19:06,710 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 26 times [2021-05-02 23:19:06,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:06,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884380360] [2021-05-02 23:19:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:06,718 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_761 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_761} OutVars{main_~x~0=v_main_~x~0_761} AuxVars[] AssignedVars[] [2021-05-02 23:19:06,720 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:19:06,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:19:06,806 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:19:06,850 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:19:06,943 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:19:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:12,321 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:12,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884380360] [2021-05-02 23:19:12,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [884380360] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:12,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:12,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:19:12,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53419654] [2021-05-02 23:19:12,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:19:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:19:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=12103, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:19:12,323 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 112 states, 110 states have (on average 1.009090909090909) internal successors, (111), 58 states have internal predecessors, (111), 28 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:19:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:20,529 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2021-05-02 23:19:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:19:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 110 states have (on average 1.009090909090909) internal successors, (111), 58 states have internal predecessors, (111), 28 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 167 [2021-05-02 23:19:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:20,531 INFO L225 Difference]: With dead ends: 181 [2021-05-02 23:19:20,532 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 23:19:20,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 56 SyntacticMatches, 27 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16463 ImplicationChecksByTransitivity, 10085.1ms TimeCoverageRelationStatistics Valid=908, Invalid=45964, Unknown=0, NotChecked=0, Total=46872 [2021-05-02 23:19:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 23:19:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2021-05-02 23:19:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:19:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2021-05-02 23:19:20,570 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 167 [2021-05-02 23:19:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:20,570 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2021-05-02 23:19:20,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 110 states have (on average 1.009090909090909) internal successors, (111), 58 states have internal predecessors, (111), 28 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:19:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2021-05-02 23:19:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:19:20,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:20,571 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:20,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:19:20,572 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1976710032, now seen corresponding path program 27 times [2021-05-02 23:19:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:20,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348186713] [2021-05-02 23:19:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:20,579 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_817 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_817} OutVars{main_~x~0=v_main_~x~0_817} AuxVars[] AssignedVars[] [2021-05-02 23:19:20,581 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:19:20,581 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:19:20,769 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:19:20,811 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:19:20,864 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:19:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:27,793 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348186713] [2021-05-02 23:19:27,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [348186713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:27,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:27,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:19:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947434100] [2021-05-02 23:19:27,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:19:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:19:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=12999, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:19:27,795 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 116 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 60 states have internal predecessors, (115), 29 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:19:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:36,675 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2021-05-02 23:19:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:19:36,676 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 60 states have internal predecessors, (115), 29 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 173 [2021-05-02 23:19:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:36,677 INFO L225 Difference]: With dead ends: 187 [2021-05-02 23:19:36,677 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 23:19:36,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 58 SyntacticMatches, 28 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17744 ImplicationChecksByTransitivity, 11946.0ms TimeCoverageRelationStatistics Valid=942, Invalid=49458, Unknown=0, NotChecked=0, Total=50400 [2021-05-02 23:19:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 23:19:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-05-02 23:19:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:19:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2021-05-02 23:19:36,700 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 173 [2021-05-02 23:19:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:36,700 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2021-05-02 23:19:36,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 60 states have internal predecessors, (115), 29 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:19:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2021-05-02 23:19:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:19:36,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:36,701 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:36,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:19:36,702 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1243629166, now seen corresponding path program 28 times [2021-05-02 23:19:36,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:36,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689237014] [2021-05-02 23:19:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:36,709 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_875 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_875} OutVars{main_~x~0=v_main_~x~0_875} AuxVars[] AssignedVars[] [2021-05-02 23:19:36,710 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:19:36,711 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:19:36,791 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:19:36,847 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:19:36,902 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:19:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:36,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:44,995 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:44,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689237014] [2021-05-02 23:19:44,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [689237014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:44,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:44,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:19:44,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569298715] [2021-05-02 23:19:44,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:19:44,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:19:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=13927, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:19:44,997 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 120 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 62 states have internal predecessors, (119), 30 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:19:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:55,368 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2021-05-02 23:19:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:19:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 62 states have internal predecessors, (119), 30 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 179 [2021-05-02 23:19:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:55,371 INFO L225 Difference]: With dead ends: 193 [2021-05-02 23:19:55,371 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:19:55,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 60 SyntacticMatches, 29 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19073 ImplicationChecksByTransitivity, 14018.3ms TimeCoverageRelationStatistics Valid=976, Invalid=53080, Unknown=0, NotChecked=0, Total=54056 [2021-05-02 23:19:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:19:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-05-02 23:19:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:19:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2021-05-02 23:19:55,430 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 179 [2021-05-02 23:19:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:55,430 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2021-05-02 23:19:55,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 62 states have internal predecessors, (119), 30 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:19:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2021-05-02 23:19:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:19:55,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:55,431 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:55,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:19:55,432 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1002453708, now seen corresponding path program 29 times [2021-05-02 23:19:55,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:55,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431138379] [2021-05-02 23:19:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:55,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_935 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_935} OutVars{main_~x~0=v_main_~x~0_935} AuxVars[] AssignedVars[] [2021-05-02 23:19:55,451 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:19:55,462 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:19:55,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:19:55,602 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:19:55,662 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:19:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:05,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:05,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431138379] [2021-05-02 23:20:05,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431138379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:05,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:05,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:20:05,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032917451] [2021-05-02 23:20:05,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:20:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:20:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=14887, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:20:05,304 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 124 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 64 states have internal predecessors, (123), 31 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:20:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:19,383 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2021-05-02 23:20:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:20:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 64 states have internal predecessors, (123), 31 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 185 [2021-05-02 23:20:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:19,386 INFO L225 Difference]: With dead ends: 199 [2021-05-02 23:20:19,386 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:20:19,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 62 SyntacticMatches, 30 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20450 ImplicationChecksByTransitivity, 17029.4ms TimeCoverageRelationStatistics Valid=1010, Invalid=56830, Unknown=0, NotChecked=0, Total=57840 [2021-05-02 23:20:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:20:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-05-02 23:20:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:20:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2021-05-02 23:20:19,429 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 185 [2021-05-02 23:20:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:19,430 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2021-05-02 23:20:19,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 64 states have internal predecessors, (123), 31 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:20:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2021-05-02 23:20:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 23:20:19,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:19,431 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:19,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:20:19,442 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash 388165802, now seen corresponding path program 30 times [2021-05-02 23:20:19,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:19,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960714148] [2021-05-02 23:20:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:19,450 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_997 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_997} OutVars{main_~x~0=v_main_~x~0_997} AuxVars[] AssignedVars[] [2021-05-02 23:20:19,452 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:20:19,463 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:20:19,604 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-02 23:20:19,715 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 23:20:19,727 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:20:19,775 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:20:19,861 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:20:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:31,181 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960714148] [2021-05-02 23:20:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [960714148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:31,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:31,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:20:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456867671] [2021-05-02 23:20:31,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:20:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:20:31,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=15879, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:20:31,183 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 128 states, 126 states have (on average 1.007936507936508) internal successors, (127), 66 states have internal predecessors, (127), 32 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:20:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:46,952 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2021-05-02 23:20:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:20:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 126 states have (on average 1.007936507936508) internal successors, (127), 66 states have internal predecessors, (127), 32 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 191 [2021-05-02 23:20:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:46,955 INFO L225 Difference]: With dead ends: 205 [2021-05-02 23:20:46,955 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 23:20:46,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 64 SyntacticMatches, 31 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21875 ImplicationChecksByTransitivity, 19958.0ms TimeCoverageRelationStatistics Valid=1044, Invalid=60708, Unknown=0, NotChecked=0, Total=61752 [2021-05-02 23:20:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 23:20:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-05-02 23:20:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:20:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2021-05-02 23:20:47,005 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 191 [2021-05-02 23:20:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:47,005 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2021-05-02 23:20:47,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 126 states have (on average 1.007936507936508) internal successors, (127), 66 states have internal predecessors, (127), 32 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:20:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2021-05-02 23:20:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:20:47,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:47,006 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:47,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:20:47,006 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 143738888, now seen corresponding path program 31 times [2021-05-02 23:20:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:47,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089108008] [2021-05-02 23:20:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:47,016 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1061 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1061} OutVars{main_~x~0=v_main_~x~0_1061} AuxVars[] AssignedVars[] [2021-05-02 23:20:47,022 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:20:47,023 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:20:47,233 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:20:47,288 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:20:47,376 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:20:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:47,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:01,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:01,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089108008] [2021-05-02 23:21:01,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089108008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:01,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:01,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:21:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000287956] [2021-05-02 23:21:01,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:21:01,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:21:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=16903, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:21:01,275 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 132 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 68 states have internal predecessors, (131), 33 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:21:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:21,661 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2021-05-02 23:21:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:21:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 68 states have internal predecessors, (131), 33 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 197 [2021-05-02 23:21:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:21,664 INFO L225 Difference]: With dead ends: 211 [2021-05-02 23:21:21,664 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 23:21:21,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 66 SyntacticMatches, 31 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23348 ImplicationChecksByTransitivity, 24002.7ms TimeCoverageRelationStatistics Valid=1078, Invalid=64714, Unknown=0, NotChecked=0, Total=65792 [2021-05-02 23:21:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 23:21:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2021-05-02 23:21:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:21:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2021-05-02 23:21:21,696 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 197 [2021-05-02 23:21:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:21,697 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2021-05-02 23:21:21,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 68 states have internal predecessors, (131), 33 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:21:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2021-05-02 23:21:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 23:21:21,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:21,698 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:21,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:21:21,698 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:21,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:21,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1512841446, now seen corresponding path program 32 times [2021-05-02 23:21:21,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:21,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333473401] [2021-05-02 23:21:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:21,709 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1127 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1127} OutVars{main_~x~0=v_main_~x~0_1127} AuxVars[] AssignedVars[] [2021-05-02 23:21:21,715 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:21:21,729 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:21:21,834 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:21:22,058 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:21:22,153 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:21:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:22,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:41,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:41,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333473401] [2021-05-02 23:21:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333473401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:41,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:41,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:21:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619710982] [2021-05-02 23:21:41,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:21:41,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:21:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=17959, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:21:41,008 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand has 136 states, 134 states have (on average 1.007462686567164) internal successors, (135), 70 states have internal predecessors, (135), 34 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:22:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:06,650 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2021-05-02 23:22:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:22:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 134 states have (on average 1.007462686567164) internal successors, (135), 70 states have internal predecessors, (135), 34 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 203 [2021-05-02 23:22:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:06,654 INFO L225 Difference]: With dead ends: 217 [2021-05-02 23:22:06,654 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:22:06,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 68 SyntacticMatches, 33 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24869 ImplicationChecksByTransitivity, 32071.8ms TimeCoverageRelationStatistics Valid=1112, Invalid=68848, Unknown=0, NotChecked=0, Total=69960 [2021-05-02 23:22:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:22:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2021-05-02 23:22:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:22:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2021-05-02 23:22:06,686 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 203 [2021-05-02 23:22:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:06,686 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2021-05-02 23:22:06,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 134 states have (on average 1.007462686567164) internal successors, (135), 70 states have internal predecessors, (135), 34 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:22:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2021-05-02 23:22:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-05-02 23:22:06,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:06,688 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:06,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:22:06,688 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1309910204, now seen corresponding path program 33 times [2021-05-02 23:22:06,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:06,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928244232] [2021-05-02 23:22:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:06,700 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1195 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1195} OutVars{main_~x~0=v_main_~x~0_1195} AuxVars[] AssignedVars[] [2021-05-02 23:22:06,703 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:22:06,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:22:06,869 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:22:06,971 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:22:07,067 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:22:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:07,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:31,636 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:31,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928244232] [2021-05-02 23:22:31,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928244232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:31,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:31,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-02 23:22:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504476522] [2021-05-02 23:22:31,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 23:22:31,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:31,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 23:22:31,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=19047, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:22:31,639 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 140 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 72 states have internal predecessors, (139), 35 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:23:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:04,046 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2021-05-02 23:23:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:23:04,049 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 72 states have internal predecessors, (139), 35 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 209 [2021-05-02 23:23:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:04,051 INFO L225 Difference]: With dead ends: 223 [2021-05-02 23:23:04,051 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 23:23:04,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 70 SyntacticMatches, 34 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26438 ImplicationChecksByTransitivity, 41561.2ms TimeCoverageRelationStatistics Valid=1146, Invalid=73110, Unknown=0, NotChecked=0, Total=74256 [2021-05-02 23:23:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 23:23:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-05-02 23:23:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 37 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:23:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2021-05-02 23:23:04,085 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 209 [2021-05-02 23:23:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:04,085 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2021-05-02 23:23:04,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 72 states have internal predecessors, (139), 35 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:23:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2021-05-02 23:23:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-05-02 23:23:04,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:04,086 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:04,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:23:04,087 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -811411678, now seen corresponding path program 34 times [2021-05-02 23:23:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320618987] [2021-05-02 23:23:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:04,098 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1265 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1265} OutVars{main_~x~0=v_main_~x~0_1265} AuxVars[] AssignedVars[] [2021-05-02 23:23:04,101 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:23:04,103 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:23:04,256 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:23:04,339 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:23:04,547 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:23:04,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:23:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:04,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:37,296 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:37,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320618987] [2021-05-02 23:23:37,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320618987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:37,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:37,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-02 23:23:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678104176] [2021-05-02 23:23:37,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 23:23:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 23:23:37,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=20167, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:23:37,299 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand has 144 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 74 states have internal predecessors, (143), 36 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:24:06,142 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:24:06,501 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:24:11,736 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:24:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:24,822 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2021-05-02 23:24:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 23:24:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 74 states have internal predecessors, (143), 36 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 215 [2021-05-02 23:24:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:24,827 INFO L225 Difference]: With dead ends: 229 [2021-05-02 23:24:24,827 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 23:24:24,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 72 SyntacticMatches, 34 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28055 ImplicationChecksByTransitivity, 57138.0ms TimeCoverageRelationStatistics Valid=1180, Invalid=77500, Unknown=0, NotChecked=0, Total=78680 [2021-05-02 23:24:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 23:24:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2021-05-02 23:24:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 states have internal predecessors, (148), 38 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:24:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2021-05-02 23:24:24,860 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 215 [2021-05-02 23:24:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:24,861 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2021-05-02 23:24:24,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 74 states have internal predecessors, (143), 36 states have call successors, (37), 37 states have call predecessors, (37), 35 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:24:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2021-05-02 23:24:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 23:24:24,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:24,862 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:24,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:24:24,862 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash -889686912, now seen corresponding path program 35 times [2021-05-02 23:24:24,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:24,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034335941] [2021-05-02 23:24:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:24,874 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1337 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1337} OutVars{main_~x~0=v_main_~x~0_1337} AuxVars[] AssignedVars[] [2021-05-02 23:24:24,876 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:24:24,878 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:24:25,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:24:25,301 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-02 23:24:25,322 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:24:25,441 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:24:25,444 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:24:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:09,031 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034335941] [2021-05-02 23:25:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034335941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:09,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:09,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2021-05-02 23:25:09,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772923833] [2021-05-02 23:25:09,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-02 23:25:09,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-02 23:25:09,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=21319, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 23:25:09,035 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand has 148 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 76 states have internal predecessors, (147), 37 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:25:09,936 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:10,898 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:11,622 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:25:12,123 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:16,589 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:18,483 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:20,477 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:31,251 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:34,205 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:35,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:25:35,623 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:36,233 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:36,652 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:37,442 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:25:38,063 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:38,627 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:25:39,061 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:39,851 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:25:41,443 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:42,180 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:25:43,625 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:44,309 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:25:45,777 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:48,016 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:48,712 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:25:50,227 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:50,977 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:25:52,355 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:58,787 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:25:59,892 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:26:02,165 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:26:09,050 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:26:09,470 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:26:10,249 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:26:10,814 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:26:12,324 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:26:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:16,149 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2021-05-02 23:26:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-02 23:26:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 76 states have internal predecessors, (147), 37 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 221 [2021-05-02 23:26:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:16,157 INFO L225 Difference]: With dead ends: 235 [2021-05-02 23:26:16,157 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 23:26:16,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 74 SyntacticMatches, 36 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29720 ImplicationChecksByTransitivity, 76084.9ms TimeCoverageRelationStatistics Valid=1214, Invalid=82018, Unknown=0, NotChecked=0, Total=83232 [2021-05-02 23:26:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 23:26:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2021-05-02 23:26:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 39 states have call successors, (39), 39 states have call predecessors, (39), 37 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 23:26:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2021-05-02 23:26:16,228 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 221 [2021-05-02 23:26:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:16,229 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2021-05-02 23:26:16,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 76 states have internal predecessors, (147), 37 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:26:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2021-05-02 23:26:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 23:26:16,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:16,230 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:16,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:26:16,230 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash -781315234, now seen corresponding path program 36 times [2021-05-02 23:26:16,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:16,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649570247] [2021-05-02 23:26:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:16,248 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1411 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1411} OutVars{main_~x~0=v_main_~x~0_1411} AuxVars[] AssignedVars[] [2021-05-02 23:26:16,252 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:26:16,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:26:16,485 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 1 [2021-05-02 23:26:16,649 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:26:16,778 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:26:17,056 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:26:17,062 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:26:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:23,770 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:23,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649570247] [2021-05-02 23:27:23,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649570247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:23,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:23,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2021-05-02 23:27:23,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641791406] [2021-05-02 23:27:23,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-02 23:27:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-02 23:27:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=22503, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 23:27:23,773 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand has 152 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 78 states have internal predecessors, (151), 38 states have call successors, (39), 39 states have call predecessors, (39), 37 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 23:27:26,043 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 23:27:27,678 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:28,091 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:28,885 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:27:29,542 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:30,226 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:30,642 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:31,362 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:27:32,017 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:32,677 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:33,065 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:33,802 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:27:34,407 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:35,359 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:36,102 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:27:36,664 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:37,625 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:38,936 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:39,607 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:40,053 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:40,865 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:27:41,502 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:42,207 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:42,698 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:43,490 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:27:55,378 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:55,978 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:56,336 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:57,078 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:27:57,682 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:58,291 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:27:58,695 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:27:59,459 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:28:00,020 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:28:00,943 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:01,603 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:28:03,022 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:05,109 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:07,093 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:09,034 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:09,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:28:12,937 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:14,620 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:28:15,041 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:28:15,860 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 23:28:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:29,339 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2021-05-02 23:28:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-02 23:28:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 78 states have internal predecessors, (151), 38 states have call successors, (39), 39 states have call predecessors, (39), 37 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 227 [2021-05-02 23:28:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:29,347 INFO L225 Difference]: With dead ends: 241 [2021-05-02 23:28:29,348 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 23:28:29,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 76 SyntacticMatches, 36 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31433 ImplicationChecksByTransitivity, 100259.2ms TimeCoverageRelationStatistics Valid=1248, Invalid=86664, Unknown=0, NotChecked=0, Total=87912 [2021-05-02 23:28:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 23:28:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-05-02 23:28:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 40 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:28:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2021-05-02 23:28:29,383 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 227 [2021-05-02 23:28:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:29,384 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2021-05-02 23:28:29,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 78 states have internal predecessors, (151), 38 states have call successors, (39), 39 states have call predecessors, (39), 37 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 23:28:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2021-05-02 23:28:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 23:28:29,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:29,386 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:29,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:28:29,386 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1683788732, now seen corresponding path program 37 times [2021-05-02 23:28:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:29,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169185525] [2021-05-02 23:28:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:29,404 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1487 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1487} OutVars{main_~x~0=v_main_~x~0_1487} AuxVars[] AssignedVars[] [2021-05-02 23:28:29,408 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:28:29,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:28:29,738 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-02 23:28:29,943 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:28:31,974 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 9 [2021-05-02 23:28:32,097 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:28:32,322 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:28:32,329 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:28:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:32,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:03,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:03,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169185525] [2021-05-02 23:29:03,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169185525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:03,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:03,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2021-05-02 23:29:03,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236435761] [2021-05-02 23:29:03,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states [2021-05-02 23:29:03,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-05-02 23:29:03,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=23719, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 23:29:03,339 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand has 156 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 80 states have internal predecessors, (155), 39 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:29:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:33,630 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2021-05-02 23:29:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-05-02 23:29:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 80 states have internal predecessors, (155), 39 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 233 [2021-05-02 23:29:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:33,636 INFO L225 Difference]: With dead ends: 247 [2021-05-02 23:29:33,636 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 23:29:33,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 78 SyntacticMatches, 37 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33194 ImplicationChecksByTransitivity, 46641.3ms TimeCoverageRelationStatistics Valid=1282, Invalid=91438, Unknown=0, NotChecked=0, Total=92720 [2021-05-02 23:29:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 23:29:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2021-05-02 23:29:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 41 states have call successors, (41), 41 states have call predecessors, (41), 39 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:29:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2021-05-02 23:29:33,674 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 233 [2021-05-02 23:29:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:33,674 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2021-05-02 23:29:33,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 156 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 80 states have internal predecessors, (155), 39 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:29:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2021-05-02 23:29:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-02 23:29:33,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:33,675 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:33,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:29:33,675 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 385144218, now seen corresponding path program 38 times [2021-05-02 23:29:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:33,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505122264] [2021-05-02 23:29:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:33,685 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1565 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1565} OutVars{main_~x~0=v_main_~x~0_1565} AuxVars[] AssignedVars[] [2021-05-02 23:29:33,687 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:29:33,704 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:29:33,839 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:29:33,954 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:29:34,097 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:29:34,100 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:29:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:57,365 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:57,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505122264] [2021-05-02 23:29:57,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1505122264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:57,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:57,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2021-05-02 23:29:57,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297156951] [2021-05-02 23:29:57,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 160 states [2021-05-02 23:29:57,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-05-02 23:29:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=24967, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:29:57,367 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand has 160 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 82 states have internal predecessors, (159), 40 states have call successors, (41), 41 states have call predecessors, (41), 39 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:30:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:29,228 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2021-05-02 23:30:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-05-02 23:30:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 82 states have internal predecessors, (159), 40 states have call successors, (41), 41 states have call predecessors, (41), 39 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 239 [2021-05-02 23:30:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:29,232 INFO L225 Difference]: With dead ends: 253 [2021-05-02 23:30:29,232 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 23:30:29,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 80 SyntacticMatches, 38 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35003 ImplicationChecksByTransitivity, 40320.8ms TimeCoverageRelationStatistics Valid=1316, Invalid=96340, Unknown=0, NotChecked=0, Total=97656 [2021-05-02 23:30:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 23:30:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 246. [2021-05-02 23:30:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 42 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:30:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2021-05-02 23:30:29,281 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 239 [2021-05-02 23:30:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:29,282 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2021-05-02 23:30:29,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 160 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 82 states have internal predecessors, (159), 40 states have call successors, (41), 41 states have call predecessors, (41), 39 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:30:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2021-05-02 23:30:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 23:30:29,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:29,283 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:29,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:30:29,283 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:29,283 INFO L82 PathProgramCache]: Analyzing trace with hash -868239112, now seen corresponding path program 39 times [2021-05-02 23:30:29,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:29,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478569179] [2021-05-02 23:30:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:29,291 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1645 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1645} OutVars{main_~x~0=v_main_~x~0_1645} AuxVars[] AssignedVars[] [2021-05-02 23:30:29,293 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:30:29,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:30:29,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:30:29,446 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:30:29,570 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:30:29,573 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:30:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:29,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:55,183 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:55,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478569179] [2021-05-02 23:30:55,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [478569179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:55,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:55,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2021-05-02 23:30:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998738865] [2021-05-02 23:30:55,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 164 states [2021-05-02 23:30:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-05-02 23:30:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=26247, Unknown=0, NotChecked=0, Total=26732 [2021-05-02 23:30:55,186 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand has 164 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 84 states have internal predecessors, (163), 41 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:31:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:28,929 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2021-05-02 23:31:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-02 23:31:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 84 states have internal predecessors, (163), 41 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 245 [2021-05-02 23:31:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:28,932 INFO L225 Difference]: With dead ends: 259 [2021-05-02 23:31:28,933 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:31:28,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 82 SyntacticMatches, 40 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36860 ImplicationChecksByTransitivity, 42118.7ms TimeCoverageRelationStatistics Valid=1350, Invalid=101370, Unknown=0, NotChecked=0, Total=102720 [2021-05-02 23:31:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:31:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2021-05-02 23:31:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 43 states have call successors, (43), 43 states have call predecessors, (43), 41 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 23:31:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2021-05-02 23:31:28,967 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 245 [2021-05-02 23:31:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:28,968 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2021-05-02 23:31:28,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 164 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 84 states have internal predecessors, (163), 41 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:31:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2021-05-02 23:31:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 23:31:28,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:28,969 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:28,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:31:28,969 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1964907990, now seen corresponding path program 40 times [2021-05-02 23:31:28,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:28,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152581989] [2021-05-02 23:31:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:28,978 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_1727 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_1727} OutVars{main_~x~0=v_main_~x~0_1727} AuxVars[] AssignedVars[] [2021-05-02 23:31:28,979 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:31:28,994 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:31:29,207 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-02 23:31:29,224 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:31:29,279 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:31:29,432 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:31:29,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:31:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:29,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.