/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-zilu/benchmark34_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:35:28,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:35:28,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:35:28,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:35:28,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:35:28,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:35:28,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:35:28,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:35:28,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:35:28,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:35:28,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:35:28,293 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:35:28,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:35:28,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:35:28,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:35:28,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:35:28,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:35:28,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:35:28,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:35:28,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:35:28,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:35:28,296 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:35:28,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:35:28,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:35:28,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:35:28,609 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:35:28,609 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:35:28,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i [2021-05-03 00:35:28,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394f71375/64f19cd41bb5496eb623f5831a4310ca/FLAG8e2090028 [2021-05-03 00:35:29,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:35:29,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark34_conjunctive.i [2021-05-03 00:35:29,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394f71375/64f19cd41bb5496eb623f5831a4310ca/FLAG8e2090028 [2021-05-03 00:35:29,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394f71375/64f19cd41bb5496eb623f5831a4310ca [2021-05-03 00:35:29,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:35:29,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:35:29,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:35:29,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:35:29,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:35:29,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c85c5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29, skipping insertion in model container [2021-05-03 00:35:29,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:35:29,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:35:29,233 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-zilu/benchmark34_conjunctive.i[873,886] [2021-05-03 00:35:29,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:35:29,255 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:35:29,305 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-zilu/benchmark34_conjunctive.i[873,886] [2021-05-03 00:35:29,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:35:29,322 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:35:29,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29 WrapperNode [2021-05-03 00:35:29,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:35:29,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:35:29,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:35:29,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:35:29,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... [2021-05-03 00:35:29,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:35:29,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:35:29,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:35:29,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:35:29,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:35:29,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:35:29,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:35:29,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:35:29,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:35:29,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:35:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:35:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:35:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:35:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:35:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:35:29,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:35:29,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:35:29,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:35:29 BoogieIcfgContainer [2021-05-03 00:35:29,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:35:29,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:35:29,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:35:29,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:35:29,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:35:29" (1/3) ... [2021-05-03 00:35:29,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ade613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:35:29, skipping insertion in model container [2021-05-03 00:35:29,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:35:29" (2/3) ... [2021-05-03 00:35:29,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ade613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:35:29, skipping insertion in model container [2021-05-03 00:35:29,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:35:29" (3/3) ... [2021-05-03 00:35:29,688 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark34_conjunctive.i [2021-05-03 00:35:29,692 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:35:29,695 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:35:29,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:35:29,719 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:35:29,720 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:35:29,720 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:35:29,720 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:35:29,720 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:35:29,720 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:35:29,720 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:35:29,720 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:35:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:35:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:35:29,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:29,734 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:29,734 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-03 00:35:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:29,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265224170] [2021-05-03 00:35:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:29,819 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:35:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:30,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:30,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265224170] [2021-05-03 00:35:30,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265224170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:30,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:30,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:35:30,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712109681] [2021-05-03 00:35:30,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:35:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:30,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:35:30,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:35:30,047 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:30,161 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-03 00:35:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:35:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:35:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:30,169 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:35:30,169 INFO L226 Difference]: Without dead ends: 14 [2021-05-03 00:35:30,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:35:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-03 00:35:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-03 00:35:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-03 00:35:30,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-03 00:35:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:30,211 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-03 00:35:30,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-03 00:35:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:35:30,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:30,212 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:30,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:35:30,213 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-05-03 00:35:30,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:30,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324048423] [2021-05-03 00:35:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:30,258 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_6) (< v_main_~j~0_8 v_main_~n~0_6)) InVars {main_~n~0=v_main_~n~0_6, main_~j~0=v_main_~j~0_8} OutVars{main_~n~0=v_main_~n~0_6, main_~j~0=v_main_~j~0_8} AuxVars[] AssignedVars[] [2021-05-03 00:35:30,290 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:30,348 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:30,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:30,380 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:30,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:30,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:30,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:30,695 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:30,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324048423] [2021-05-03 00:35:30,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [324048423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:30,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:30,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:35:30,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316429198] [2021-05-03 00:35:30,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:35:30,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:35:30,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:35:30,700 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:30,994 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-03 00:35:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:35:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-03 00:35:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:30,996 INFO L225 Difference]: With dead ends: 20 [2021-05-03 00:35:30,996 INFO L226 Difference]: Without dead ends: 15 [2021-05-03 00:35:30,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:35:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-03 00:35:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-03 00:35:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-03 00:35:31,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-03 00:35:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:31,013 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-03 00:35:31,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-03 00:35:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:35:31,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:31,014 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:31,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:35:31,015 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2021-05-03 00:35:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020992464] [2021-05-03 00:35:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:31,030 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_7) (< v_main_~j~0_12 v_main_~n~0_7)) InVars {main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_12} OutVars{main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_12} AuxVars[] AssignedVars[] [2021-05-03 00:35:31,046 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:31,050 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:31,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:31,092 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:31,122 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:31,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:31,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,399 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020992464] [2021-05-03 00:35:31,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020992464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:31,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:31,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:35:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442995254] [2021-05-03 00:35:31,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:35:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:35:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:35:31,402 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:31,689 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-03 00:35:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:35:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:35:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:31,690 INFO L225 Difference]: With dead ends: 21 [2021-05-03 00:35:31,690 INFO L226 Difference]: Without dead ends: 16 [2021-05-03 00:35:31,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:35:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-03 00:35:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-03 00:35:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-03 00:35:31,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-03 00:35:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:31,695 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-03 00:35:31,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-03 00:35:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 00:35:31,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:31,696 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:31,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:35:31,696 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 3 times [2021-05-03 00:35:31,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:31,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992953393] [2021-05-03 00:35:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:31,702 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_17 v_main_~n~0_8) (< 0 v_main_~n~0_8)) InVars {main_~n~0=v_main_~n~0_8, main_~j~0=v_main_~j~0_17} OutVars{main_~n~0=v_main_~n~0_8, main_~j~0=v_main_~j~0_17} AuxVars[] AssignedVars[] [2021-05-03 00:35:31,706 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:31,708 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:31,713 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:31,746 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:31,775 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:31,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:31,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,995 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:31,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992953393] [2021-05-03 00:35:31,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992953393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:31,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:31,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:35:31,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509949617] [2021-05-03 00:35:31,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:35:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:35:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:35:31,997 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:32,368 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-03 00:35:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:35:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-03 00:35:32,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:32,369 INFO L225 Difference]: With dead ends: 22 [2021-05-03 00:35:32,369 INFO L226 Difference]: Without dead ends: 17 [2021-05-03 00:35:32,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:35:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-03 00:35:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-03 00:35:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-03 00:35:32,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-03 00:35:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:32,374 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-03 00:35:32,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-03 00:35:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:35:32,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:32,375 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:32,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:35:32,375 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 4 times [2021-05-03 00:35:32,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:32,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686216634] [2021-05-03 00:35:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:32,386 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_23 v_main_~n~0_9) (< 0 v_main_~n~0_9)) InVars {main_~n~0=v_main_~n~0_9, main_~j~0=v_main_~j~0_23} OutVars{main_~n~0=v_main_~n~0_9, main_~j~0=v_main_~j~0_23} AuxVars[] AssignedVars[] [2021-05-03 00:35:32,389 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:32,423 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:32,428 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:32,440 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:32,458 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:32,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:32,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:32,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:32,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686216634] [2021-05-03 00:35:32,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1686216634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:32,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:32,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:35:32,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419697508] [2021-05-03 00:35:32,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:35:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:35:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:35:32,744 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:33,142 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-03 00:35:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:35:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:35:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:33,143 INFO L225 Difference]: With dead ends: 23 [2021-05-03 00:35:33,143 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 00:35:33,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:35:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 00:35:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 00:35:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-03 00:35:33,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-03 00:35:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:33,149 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-03 00:35:33,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-03 00:35:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:35:33,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:33,150 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:33,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:35:33,150 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 5 times [2021-05-03 00:35:33,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:33,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057022873] [2021-05-03 00:35:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:33,155 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_30 v_main_~n~0_10) (< 0 v_main_~n~0_10)) InVars {main_~n~0=v_main_~n~0_10, main_~j~0=v_main_~j~0_30} OutVars{main_~n~0=v_main_~n~0_10, main_~j~0=v_main_~j~0_30} AuxVars[] AssignedVars[] [2021-05-03 00:35:33,158 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:33,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:33,179 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:33,193 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:33,218 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:33,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:33,592 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:33,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057022873] [2021-05-03 00:35:33,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057022873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:33,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:33,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:35:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781225071] [2021-05-03 00:35:33,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:35:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:35:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:35:33,593 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:34,103 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-03 00:35:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:35:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:35:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:34,104 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:35:34,104 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 00:35:34,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:35:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 00:35:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 00:35:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-03 00:35:34,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-03 00:35:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:34,110 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-03 00:35:34,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-03 00:35:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:35:34,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:34,110 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:34,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:35:34,111 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 6 times [2021-05-03 00:35:34,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:34,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960231772] [2021-05-03 00:35:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:34,118 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_11) (< v_main_~j~0_38 v_main_~n~0_11)) InVars {main_~n~0=v_main_~n~0_11, main_~j~0=v_main_~j~0_38} OutVars{main_~n~0=v_main_~n~0_11, main_~j~0=v_main_~j~0_38} AuxVars[] AssignedVars[] [2021-05-03 00:35:34,121 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:34,137 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:34,142 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:34,159 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:34,176 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:34,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:34,556 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:34,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960231772] [2021-05-03 00:35:34,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1960231772] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:34,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:34,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:35:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030852451] [2021-05-03 00:35:34,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:35:34,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:35:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:35:34,557 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:35,119 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-03 00:35:35,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:35:35,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-03 00:35:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:35,120 INFO L225 Difference]: With dead ends: 25 [2021-05-03 00:35:35,121 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:35:35,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 725.5ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:35:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:35:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:35:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-03 00:35:35,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-03 00:35:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:35,127 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-03 00:35:35,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-03 00:35:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:35:35,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:35,127 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:35,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:35:35,128 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 7 times [2021-05-03 00:35:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:35,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862023748] [2021-05-03 00:35:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:35,144 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_12) (< v_main_~j~0_47 v_main_~n~0_12)) InVars {main_~n~0=v_main_~n~0_12, main_~j~0=v_main_~j~0_47} OutVars{main_~n~0=v_main_~n~0_12, main_~j~0=v_main_~j~0_47} AuxVars[] AssignedVars[] [2021-05-03 00:35:35,149 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:35,151 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:35,161 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:35,186 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:35,209 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:35,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:35,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:35,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:35,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862023748] [2021-05-03 00:35:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [862023748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:35,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:35,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:35:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610251054] [2021-05-03 00:35:35,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:35:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:35:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:35:35,651 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:36,182 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:35:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:36,415 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-03 00:35:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:35:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:35:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:36,417 INFO L225 Difference]: With dead ends: 26 [2021-05-03 00:35:36,417 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:35:36,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:35:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:35:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-03 00:35:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-03 00:35:36,423 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-03 00:35:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:36,423 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-03 00:35:36,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-03 00:35:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:35:36,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:36,424 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:36,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:35:36,424 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 8 times [2021-05-03 00:35:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:36,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111021794] [2021-05-03 00:35:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:36,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_13) (< v_main_~j~0_57 v_main_~n~0_13)) InVars {main_~n~0=v_main_~n~0_13, main_~j~0=v_main_~j~0_57} OutVars{main_~n~0=v_main_~n~0_13, main_~j~0=v_main_~j~0_57} AuxVars[] AssignedVars[] [2021-05-03 00:35:36,433 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:36,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:36,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:36,469 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:36,486 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:36,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:36,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:37,012 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:37,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111021794] [2021-05-03 00:35:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111021794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:37,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:37,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:35:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725629766] [2021-05-03 00:35:37,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:35:37,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:35:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:35:37,013 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:37,795 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-03 00:35:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:35:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:35:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:37,796 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:35:37,796 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:35:37,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1013.0ms TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:35:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:35:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-03 00:35:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-03 00:35:37,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-03 00:35:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:37,803 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-03 00:35:37,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-03 00:35:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:35:37,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:37,804 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:37,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:35:37,804 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 9 times [2021-05-03 00:35:37,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:37,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381598948] [2021-05-03 00:35:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:37,811 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_68 v_main_~n~0_14) (< 0 v_main_~n~0_14)) InVars {main_~n~0=v_main_~n~0_14, main_~j~0=v_main_~j~0_68} OutVars{main_~n~0=v_main_~n~0_14, main_~j~0=v_main_~j~0_68} AuxVars[] AssignedVars[] [2021-05-03 00:35:37,813 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:37,828 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:37,832 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:37,852 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:37,868 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:37,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:37,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:38,411 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381598948] [2021-05-03 00:35:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [381598948] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:38,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:38,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:35:38,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569365664] [2021-05-03 00:35:38,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:35:38,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:35:38,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:35:38,413 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:39,101 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-03 00:35:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:35:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-03 00:35:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:39,102 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:35:39,102 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:35:39,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 951.3ms TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:35:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:35:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-03 00:35:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-03 00:35:39,117 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-03 00:35:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:39,117 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-03 00:35:39,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-03 00:35:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:35:39,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:39,118 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:39,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:35:39,119 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 10 times [2021-05-03 00:35:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773320076] [2021-05-03 00:35:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:39,127 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_80 v_main_~n~0_15) (< 0 v_main_~n~0_15)) InVars {main_~n~0=v_main_~n~0_15, main_~j~0=v_main_~j~0_80} OutVars{main_~n~0=v_main_~n~0_15, main_~j~0=v_main_~j~0_80} AuxVars[] AssignedVars[] [2021-05-03 00:35:39,130 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:39,131 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:39,136 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:39,164 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:39,182 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:39,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:39,725 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773320076] [2021-05-03 00:35:39,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773320076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:39,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:35:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663836559] [2021-05-03 00:35:39,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:35:39,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:39,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:35:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:35:39,735 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:40,488 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-03 00:35:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:35:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:35:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:40,490 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:35:40,490 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:35:40,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:35:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:35:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:35:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-03 00:35:40,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-03 00:35:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:40,498 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-03 00:35:40,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-03 00:35:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:35:40,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:40,499 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:40,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:35:40,499 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 11 times [2021-05-03 00:35:40,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:40,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17219451] [2021-05-03 00:35:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:40,505 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_93 v_main_~n~0_16) (< 0 v_main_~n~0_16)) InVars {main_~n~0=v_main_~n~0_16, main_~j~0=v_main_~j~0_93} OutVars{main_~n~0=v_main_~n~0_16, main_~j~0=v_main_~j~0_93} AuxVars[] AssignedVars[] [2021-05-03 00:35:40,506 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:40,507 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:40,512 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:40,535 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:40,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:40,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:40,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:40,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:41,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:41,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:41,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17219451] [2021-05-03 00:35:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [17219451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:41,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:41,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:35:41,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332086456] [2021-05-03 00:35:41,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:35:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:35:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:35:41,246 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:42,223 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-03 00:35:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:35:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-03 00:35:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:42,224 INFO L225 Difference]: With dead ends: 30 [2021-05-03 00:35:42,224 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:35:42,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1357.2ms TimeCoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:35:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:35:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-03 00:35:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-03 00:35:42,233 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-03 00:35:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:42,233 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-03 00:35:42,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-03 00:35:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:35:42,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:42,234 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:42,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:35:42,234 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 12 times [2021-05-03 00:35:42,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:42,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352249410] [2021-05-03 00:35:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:42,243 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_17) (< v_main_~j~0_107 v_main_~n~0_17)) InVars {main_~n~0=v_main_~n~0_17, main_~j~0=v_main_~j~0_107} OutVars{main_~n~0=v_main_~n~0_17, main_~j~0=v_main_~j~0_107} AuxVars[] AssignedVars[] [2021-05-03 00:35:42,244 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:42,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:42,265 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:42,277 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:42,293 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:42,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:42,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:43,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:43,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352249410] [2021-05-03 00:35:43,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [352249410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:43,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:43,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:35:43,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049173231] [2021-05-03 00:35:43,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:35:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:35:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:35:43,058 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:44,157 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-03 00:35:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:35:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:35:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:44,159 INFO L225 Difference]: With dead ends: 31 [2021-05-03 00:35:44,159 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:35:44,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1532.8ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:35:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:35:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:35:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-03 00:35:44,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-03 00:35:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:44,172 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-03 00:35:44,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-03 00:35:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:35:44,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:44,173 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:44,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:35:44,173 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 13 times [2021-05-03 00:35:44,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:44,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336798171] [2021-05-03 00:35:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:44,178 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_18) (< v_main_~j~0_122 v_main_~n~0_18)) InVars {main_~n~0=v_main_~n~0_18, main_~j~0=v_main_~j~0_122} OutVars{main_~n~0=v_main_~n~0_18, main_~j~0=v_main_~j~0_122} AuxVars[] AssignedVars[] [2021-05-03 00:35:44,180 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:44,180 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:44,185 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:44,209 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:44,225 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:44,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:44,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336798171] [2021-05-03 00:35:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336798171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:44,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:44,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:35:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48602817] [2021-05-03 00:35:44,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:35:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:35:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:35:44,973 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:45,935 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-03 00:35:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:35:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-03 00:35:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:45,936 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:35:45,937 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:35:45,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1479.3ms TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:35:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:35:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 00:35:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-03 00:35:45,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-03 00:35:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:45,947 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-03 00:35:45,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-03 00:35:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:35:45,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:45,947 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:45,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:35:45,948 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 14 times [2021-05-03 00:35:45,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:45,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202388753] [2021-05-03 00:35:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:45,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_19) (< v_main_~j~0_138 v_main_~n~0_19)) InVars {main_~n~0=v_main_~n~0_19, main_~j~0=v_main_~j~0_138} OutVars{main_~n~0=v_main_~n~0_19, main_~j~0=v_main_~j~0_138} AuxVars[] AssignedVars[] [2021-05-03 00:35:45,953 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:45,969 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:45,974 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:45,984 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:46,000 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:46,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:46,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202388753] [2021-05-03 00:35:46,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [202388753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:46,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:46,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:35:46,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662765437] [2021-05-03 00:35:46,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:35:46,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:35:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:35:46,783 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:47,848 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-03 00:35:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:35:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-03 00:35:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:47,849 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:35:47,849 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:35:47,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1548.0ms TimeCoverageRelationStatistics Valid=468, Invalid=1172, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:35:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:35:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 00:35:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-03 00:35:47,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-03 00:35:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:47,878 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-03 00:35:47,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-03 00:35:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:35:47,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:47,879 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:47,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:35:47,879 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:47,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 15 times [2021-05-03 00:35:47,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:47,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191772823] [2021-05-03 00:35:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:47,885 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_20) (< v_main_~j~0_155 v_main_~n~0_20)) InVars {main_~n~0=v_main_~n~0_20, main_~j~0=v_main_~j~0_155} OutVars{main_~n~0=v_main_~n~0_20, main_~j~0=v_main_~j~0_155} AuxVars[] AssignedVars[] [2021-05-03 00:35:47,888 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:47,889 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:47,894 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:47,916 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:47,932 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:48,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:48,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:48,923 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:48,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191772823] [2021-05-03 00:35:48,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [191772823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:48,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:48,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:35:48,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146931162] [2021-05-03 00:35:48,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:35:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:35:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:35:48,925 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:50,300 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-03 00:35:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:35:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-03 00:35:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:50,301 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:35:50,301 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:35:50,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 2013.7ms TimeCoverageRelationStatistics Valid=521, Invalid=1285, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:35:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:35:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:35:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-03 00:35:50,314 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-03 00:35:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:50,314 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-03 00:35:50,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-03 00:35:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:35:50,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:50,315 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:50,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:35:50,315 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 16 times [2021-05-03 00:35:50,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:50,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524649840] [2021-05-03 00:35:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:50,320 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_21) (< v_main_~j~0_173 v_main_~n~0_21)) InVars {main_~n~0=v_main_~n~0_21, main_~j~0=v_main_~j~0_173} OutVars{main_~n~0=v_main_~n~0_21, main_~j~0=v_main_~j~0_173} AuxVars[] AssignedVars[] [2021-05-03 00:35:50,322 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:50,337 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:50,342 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:50,354 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:50,370 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:50,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:51,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:51,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524649840] [2021-05-03 00:35:51,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [524649840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:51,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:51,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:35:51,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169772890] [2021-05-03 00:35:51,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:35:51,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:51,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:35:51,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:35:51,360 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:52,752 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-03 00:35:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:35:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-03 00:35:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:52,753 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:35:52,753 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:35:52,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2063.0ms TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:35:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:35:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 00:35:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-03 00:35:52,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-03 00:35:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:52,767 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-03 00:35:52,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-03 00:35:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:35:52,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:52,769 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:52,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:35:52,769 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 17 times [2021-05-03 00:35:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:52,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495902991] [2021-05-03 00:35:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:52,775 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_22) (< v_main_~j~0_192 v_main_~n~0_22)) InVars {main_~n~0=v_main_~n~0_22, main_~j~0=v_main_~j~0_192} OutVars{main_~n~0=v_main_~n~0_22, main_~j~0=v_main_~j~0_192} AuxVars[] AssignedVars[] [2021-05-03 00:35:52,777 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:52,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:52,799 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:52,812 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:52,829 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:52,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:52,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:53,878 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:53,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495902991] [2021-05-03 00:35:53,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [495902991] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:53,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:53,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:35:53,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343915645] [2021-05-03 00:35:53,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:35:53,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:53,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:35:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:35:53,880 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:55,277 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-03 00:35:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:35:55,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-03 00:35:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:55,278 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:35:55,278 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:35:55,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2106.9ms TimeCoverageRelationStatistics Valid=636, Invalid=1526, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:35:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:35:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-03 00:35:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-03 00:35:55,292 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-03 00:35:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:55,292 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-03 00:35:55,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-03 00:35:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 00:35:55,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:55,292 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:55,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:35:55,293 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 18 times [2021-05-03 00:35:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980820095] [2021-05-03 00:35:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:55,297 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_23) (< v_main_~j~0_212 v_main_~n~0_23)) InVars {main_~n~0=v_main_~n~0_23, main_~j~0=v_main_~j~0_212} OutVars{main_~n~0=v_main_~n~0_23, main_~j~0=v_main_~j~0_212} AuxVars[] AssignedVars[] [2021-05-03 00:35:55,299 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:55,299 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:55,304 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:55,329 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:55,347 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:55,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:56,651 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:56,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980820095] [2021-05-03 00:35:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980820095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:56,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:56,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:35:56,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263490199] [2021-05-03 00:35:56,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:35:56,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:35:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:35:56,653 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:58,334 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-03 00:35:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:35:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-03 00:35:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:58,335 INFO L225 Difference]: With dead ends: 37 [2021-05-03 00:35:58,335 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:35:58,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2660.4ms TimeCoverageRelationStatistics Valid=662, Invalid=1690, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:35:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:35:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 00:35:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-03 00:35:58,349 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-03 00:35:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:58,350 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-03 00:35:58,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-03 00:35:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:35:58,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:58,350 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:58,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:35:58,350 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 19 times [2021-05-03 00:35:58,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:58,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096933355] [2021-05-03 00:35:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:58,356 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_233 v_main_~n~0_24) (< 0 v_main_~n~0_24)) InVars {main_~n~0=v_main_~n~0_24, main_~j~0=v_main_~j~0_233} OutVars{main_~n~0=v_main_~n~0_24, main_~j~0=v_main_~j~0_233} AuxVars[] AssignedVars[] [2021-05-03 00:35:58,358 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:35:58,359 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:58,364 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:58,391 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:35:58,411 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:58,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:59,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:59,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096933355] [2021-05-03 00:35:59,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096933355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:59,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:59,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:35:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629308815] [2021-05-03 00:35:59,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 00:35:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 00:35:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:35:59,918 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:02,013 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-03 00:36:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:36:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-03 00:36:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:02,016 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:36:02,016 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:36:02,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3181.4ms TimeCoverageRelationStatistics Valid=763, Invalid=1787, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:36:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:36:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 00:36:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-03 00:36:02,036 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-03 00:36:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:02,037 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-03 00:36:02,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-03 00:36:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 00:36:02,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:02,037 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:02,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:36:02,037 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 20 times [2021-05-03 00:36:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:02,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394599421] [2021-05-03 00:36:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:02,059 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_255 v_main_~n~0_25) (< 0 v_main_~n~0_25)) InVars {main_~n~0=v_main_~n~0_25, main_~j~0=v_main_~j~0_255} OutVars{main_~n~0=v_main_~n~0_25, main_~j~0=v_main_~j~0_255} AuxVars[] AssignedVars[] [2021-05-03 00:36:02,062 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:02,083 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:02,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:02,105 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:02,128 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:02,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:03,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:03,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394599421] [2021-05-03 00:36:03,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [394599421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:03,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:03,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:36:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535656538] [2021-05-03 00:36:03,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:36:03,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:36:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:36:03,728 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:05,914 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-03 00:36:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:36:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-03 00:36:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:05,917 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:36:05,917 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:36:05,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3246.6ms TimeCoverageRelationStatistics Valid=791, Invalid=1965, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:36:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:36:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-03 00:36:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-03 00:36:05,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-03 00:36:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:05,937 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-03 00:36:05,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-03 00:36:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:36:05,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:05,938 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:05,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:36:05,939 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:05,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 21 times [2021-05-03 00:36:05,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:05,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150553163] [2021-05-03 00:36:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:05,944 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_26) (< v_main_~j~0_278 v_main_~n~0_26)) InVars {main_~n~0=v_main_~n~0_26, main_~j~0=v_main_~j~0_278} OutVars{main_~n~0=v_main_~n~0_26, main_~j~0=v_main_~j~0_278} AuxVars[] AssignedVars[] [2021-05-03 00:36:05,946 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:05,968 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:05,974 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:05,987 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:06,015 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:07,679 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:07,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150553163] [2021-05-03 00:36:07,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [150553163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:07,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:07,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:36:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274831109] [2021-05-03 00:36:07,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:36:07,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:36:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:36:07,681 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:09,597 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-03 00:36:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:36:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-03 00:36:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:09,601 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:36:09,601 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:36:09,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3120.2ms TimeCoverageRelationStatistics Valid=902, Invalid=2068, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:36:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:36:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:36:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-03 00:36:09,621 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-03 00:36:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:09,621 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-03 00:36:09,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-03 00:36:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:36:09,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:09,622 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:09,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:36:09,622 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 22 times [2021-05-03 00:36:09,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:09,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547842711] [2021-05-03 00:36:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:09,627 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_302 v_main_~n~0_27) (< 0 v_main_~n~0_27)) InVars {main_~n~0=v_main_~n~0_27, main_~j~0=v_main_~j~0_302} OutVars{main_~n~0=v_main_~n~0_27, main_~j~0=v_main_~j~0_302} AuxVars[] AssignedVars[] [2021-05-03 00:36:09,629 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:09,630 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:09,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:09,666 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:09,688 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:09,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:09,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:10,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:11,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:11,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:11,441 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547842711] [2021-05-03 00:36:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547842711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:11,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:11,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:36:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089072451] [2021-05-03 00:36:11,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:36:11,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:11,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:36:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:36:11,443 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:13,817 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-03 00:36:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:36:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-03 00:36:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:13,818 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:36:13,818 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:36:13,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 3687.3ms TimeCoverageRelationStatistics Valid=932, Invalid=2260, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:36:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:36:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 00:36:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-03 00:36:13,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-03 00:36:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:13,839 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-03 00:36:13,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-03 00:36:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:36:13,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:13,839 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:13,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:36:13,839 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 23 times [2021-05-03 00:36:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:13,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697854678] [2021-05-03 00:36:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:13,844 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_28) (< v_main_~j~0_327 v_main_~n~0_28)) InVars {main_~n~0=v_main_~n~0_28, main_~j~0=v_main_~j~0_327} OutVars{main_~n~0=v_main_~n~0_28, main_~j~0=v_main_~j~0_327} AuxVars[] AssignedVars[] [2021-05-03 00:36:13,853 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:13,872 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:13,879 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:13,893 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:13,919 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:14,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:15,924 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:15,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697854678] [2021-05-03 00:36:15,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697854678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:15,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:15,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:36:15,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973427689] [2021-05-03 00:36:15,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:36:15,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:36:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:36:15,925 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:18,562 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-03 00:36:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:36:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-03 00:36:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:18,563 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:36:18,564 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:36:18,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 4162.1ms TimeCoverageRelationStatistics Valid=1053, Invalid=2369, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:36:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:36:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-03 00:36:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-03 00:36:18,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-03 00:36:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:18,585 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-03 00:36:18,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-03 00:36:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:36:18,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:18,586 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:18,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:36:18,586 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 24 times [2021-05-03 00:36:18,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:18,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378859709] [2021-05-03 00:36:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:18,597 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_353 v_main_~n~0_29) (< 0 v_main_~n~0_29)) InVars {main_~n~0=v_main_~n~0_29, main_~j~0=v_main_~j~0_353} OutVars{main_~n~0=v_main_~n~0_29, main_~j~0=v_main_~j~0_353} AuxVars[] AssignedVars[] [2021-05-03 00:36:18,599 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:18,617 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:18,622 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:18,635 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:18,655 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:18,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:20,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:20,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:20,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:20,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:20,531 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378859709] [2021-05-03 00:36:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378859709] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:20,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:20,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:36:20,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307039] [2021-05-03 00:36:20,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:36:20,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:36:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:36:20,533 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:23,028 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-03 00:36:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:36:23,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-03 00:36:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:23,029 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:36:23,029 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:36:23,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3862.0ms TimeCoverageRelationStatistics Valid=1133, Invalid=2527, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:36:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:36:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 00:36:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-03 00:36:23,051 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-03 00:36:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:23,052 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-03 00:36:23,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-03 00:36:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:36:23,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:23,052 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:23,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:36:23,052 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 25 times [2021-05-03 00:36:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385002428] [2021-05-03 00:36:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:23,067 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_380 v_main_~n~0_30) (< 0 v_main_~n~0_30)) InVars {main_~n~0=v_main_~n~0_30, main_~j~0=v_main_~j~0_380} OutVars{main_~n~0=v_main_~n~0_30, main_~j~0=v_main_~j~0_380} AuxVars[] AssignedVars[] [2021-05-03 00:36:23,069 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:23,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:23,097 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:23,109 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:23,129 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:23,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:25,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385002428] [2021-05-03 00:36:25,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385002428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:25,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:25,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:36:25,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823175572] [2021-05-03 00:36:25,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:36:25,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:36:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:36:25,192 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:27,824 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-03 00:36:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:36:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-03 00:36:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:27,825 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:36:27,825 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:36:27,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4199.1ms TimeCoverageRelationStatistics Valid=1216, Invalid=2690, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:36:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:36:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 00:36:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-03 00:36:27,848 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-03 00:36:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:27,848 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-03 00:36:27,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-03 00:36:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:36:27,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:27,849 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:27,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:36:27,849 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 26 times [2021-05-03 00:36:27,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:27,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162884396] [2021-05-03 00:36:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:27,854 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_31) (< v_main_~j~0_408 v_main_~n~0_31)) InVars {main_~n~0=v_main_~n~0_31, main_~j~0=v_main_~j~0_408} OutVars{main_~n~0=v_main_~n~0_31, main_~j~0=v_main_~j~0_408} AuxVars[] AssignedVars[] [2021-05-03 00:36:27,856 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:27,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:27,880 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:27,893 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:27,912 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:27,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:27,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:28,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:30,171 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162884396] [2021-05-03 00:36:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [162884396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:30,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:30,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:36:30,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617875745] [2021-05-03 00:36:30,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:36:30,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:36:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=743, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:36:30,172 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:33,136 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-03 00:36:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:36:33,137 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-03 00:36:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:33,137 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:36:33,137 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:36:33,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 4716.1ms TimeCoverageRelationStatistics Valid=1302, Invalid=2858, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:36:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:36:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 00:36:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-03 00:36:33,161 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-03 00:36:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:33,161 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-03 00:36:33,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-03 00:36:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:36:33,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:33,162 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:33,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:36:33,162 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 27 times [2021-05-03 00:36:33,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:33,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527499522] [2021-05-03 00:36:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:33,167 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_437 v_main_~n~0_32) (< 0 v_main_~n~0_32)) InVars {main_~n~0=v_main_~n~0_32, main_~j~0=v_main_~j~0_437} OutVars{main_~n~0=v_main_~n~0_32, main_~j~0=v_main_~j~0_437} AuxVars[] AssignedVars[] [2021-05-03 00:36:33,169 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:33,170 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:33,176 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:33,206 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:33,226 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:33,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:33,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:35,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:36,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:36,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527499522] [2021-05-03 00:36:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [527499522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:36,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:36,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:36:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921988360] [2021-05-03 00:36:36,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:36:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:36:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=810, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:36:36,149 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:39,985 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-03 00:36:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:36:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-03 00:36:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:39,986 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:36:39,986 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:36:39,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6177.8ms TimeCoverageRelationStatistics Valid=1337, Invalid=3085, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:36:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:36:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-03 00:36:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-03 00:36:40,013 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-03 00:36:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:40,013 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-03 00:36:40,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-03 00:36:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 00:36:40,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:40,013 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:40,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:36:40,014 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 28 times [2021-05-03 00:36:40,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:40,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420830280] [2021-05-03 00:36:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:40,020 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_33) (< v_main_~j~0_467 v_main_~n~0_33)) InVars {main_~n~0=v_main_~n~0_33, main_~j~0=v_main_~j~0_467} OutVars{main_~n~0=v_main_~n~0_33, main_~j~0=v_main_~j~0_467} AuxVars[] AssignedVars[] [2021-05-03 00:36:40,030 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:40,051 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:40,058 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:40,073 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:40,095 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:40,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:40,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:40,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:43,563 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420830280] [2021-05-03 00:36:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420830280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:43,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:43,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:36:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559389770] [2021-05-03 00:36:43,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:36:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:36:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:36:43,564 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:47,713 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-03 00:36:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:36:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-03 00:36:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:47,714 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:36:47,714 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:36:47,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 7058.0ms TimeCoverageRelationStatistics Valid=1427, Invalid=3265, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:36:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:36:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:36:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-03 00:36:47,742 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-03 00:36:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:47,742 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-03 00:36:47,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-03 00:36:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:36:47,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:47,743 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:47,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:36:47,743 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:47,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 29 times [2021-05-03 00:36:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:47,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634191364] [2021-05-03 00:36:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:47,748 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_34) (< v_main_~j~0_498 v_main_~n~0_34)) InVars {main_~n~0=v_main_~n~0_34, main_~j~0=v_main_~j~0_498} OutVars{main_~n~0=v_main_~n~0_34, main_~j~0=v_main_~j~0_498} AuxVars[] AssignedVars[] [2021-05-03 00:36:47,750 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:47,773 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:47,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:47,794 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:47,816 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:47,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:47,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:47,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:48,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:50,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634191364] [2021-05-03 00:36:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634191364] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:50,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:50,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:36:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308783649] [2021-05-03 00:36:50,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:36:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:36:50,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:36:50,830 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:54,465 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-03 00:36:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:36:54,466 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-03 00:36:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:54,467 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:36:54,467 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:36:54,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 6077.1ms TimeCoverageRelationStatistics Valid=1578, Invalid=3392, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:36:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:36:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-03 00:36:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-03 00:36:54,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-03 00:36:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:54,501 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-03 00:36:54,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-03 00:36:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 00:36:54,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:54,502 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:54,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:36:54,502 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 30 times [2021-05-03 00:36:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:54,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627502463] [2021-05-03 00:36:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:54,508 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_35) (< v_main_~j~0_530 v_main_~n~0_35)) InVars {main_~n~0=v_main_~n~0_35, main_~j~0=v_main_~j~0_530} OutVars{main_~n~0=v_main_~n~0_35, main_~j~0=v_main_~j~0_530} AuxVars[] AssignedVars[] [2021-05-03 00:36:54,510 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:36:54,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:54,553 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:54,575 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:36:54,603 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:54,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:54,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:55,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:57,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:58,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:58,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:58,829 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:58,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627502463] [2021-05-03 00:36:58,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [627502463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:58,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:58,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:36:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733606939] [2021-05-03 00:36:58,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:36:58,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:36:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=939, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:36:58,830 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:03,956 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-03 00:37:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:37:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-03 00:37:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:03,958 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:37:03,958 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:37:03,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 8747.5ms TimeCoverageRelationStatistics Valid=1616, Invalid=3640, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:37:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:37:03,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:37:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-03 00:37:03,990 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-03 00:37:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:03,990 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-03 00:37:03,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-03 00:37:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:37:03,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:03,991 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:03,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:37:03,991 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 31 times [2021-05-03 00:37:03,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:03,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716982954] [2021-05-03 00:37:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:03,997 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_36) (< v_main_~j~0_563 v_main_~n~0_36)) InVars {main_~n~0=v_main_~n~0_36, main_~j~0=v_main_~j~0_563} OutVars{main_~n~0=v_main_~n~0_36, main_~j~0=v_main_~j~0_563} AuxVars[] AssignedVars[] [2021-05-03 00:37:03,999 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:37:04,000 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:04,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:04,049 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:37:04,075 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:04,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:04,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:05,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:06,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:07,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:07,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:07,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:07,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:07,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:08,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:08,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:08,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:08,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716982954] [2021-05-03 00:37:08,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716982954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:08,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:08,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:37:08,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691718927] [2021-05-03 00:37:08,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:37:08,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:37:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=984, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:37:08,651 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:14,262 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-03 00:37:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:37:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-03 00:37:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:14,264 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:37:14,264 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:37:14,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 9394.1ms TimeCoverageRelationStatistics Valid=1715, Invalid=3835, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:37:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:37:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-03 00:37:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-03 00:37:14,297 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-03 00:37:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:14,297 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-03 00:37:14,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-03 00:37:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:37:14,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:14,297 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:14,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:37:14,298 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 32 times [2021-05-03 00:37:14,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:14,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588696039] [2021-05-03 00:37:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:14,303 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_37) (< v_main_~j~0_597 v_main_~n~0_37)) InVars {main_~n~0=v_main_~n~0_37, main_~j~0=v_main_~j~0_597} OutVars{main_~n~0=v_main_~n~0_37, main_~j~0=v_main_~j~0_597} AuxVars[] AssignedVars[] [2021-05-03 00:37:14,311 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:37:14,339 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:14,346 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:14,363 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:37:14,387 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:14,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:14,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:15,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:16,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:16,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:16,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:17,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:17,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:17,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:17,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:18,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:18,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:19,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:19,575 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:19,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588696039] [2021-05-03 00:37:19,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [588696039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:19,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:19,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:37:19,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625802692] [2021-05-03 00:37:19,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:37:19,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:19,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:37:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=998, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:37:19,577 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:26,079 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-03 00:37:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:37:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-03 00:37:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:26,080 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:37:26,081 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:37:26,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 10913.4ms TimeCoverageRelationStatistics Valid=1881, Invalid=3971, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:37:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:37:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-03 00:37:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-03 00:37:26,117 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-03 00:37:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:26,117 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-03 00:37:26,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-03 00:37:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:37:26,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:26,117 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:26,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:37:26,118 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 33 times [2021-05-03 00:37:26,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:26,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749232620] [2021-05-03 00:37:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:26,123 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_38) (< v_main_~j~0_632 v_main_~n~0_38)) InVars {main_~n~0=v_main_~n~0_38, main_~j~0=v_main_~j~0_632} OutVars{main_~n~0=v_main_~n~0_38, main_~j~0=v_main_~j~0_632} AuxVars[] AssignedVars[] [2021-05-03 00:37:26,127 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:37:26,128 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:26,135 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:26,168 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:37:26,198 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:26,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:26,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:29,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:29,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:29,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:30,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:30,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:30,766 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:30,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749232620] [2021-05-03 00:37:30,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749232620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:30,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:30,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:37:30,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27313298] [2021-05-03 00:37:30,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:37:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:37:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:37:30,768 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:36,859 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-03 00:37:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:37:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-03 00:37:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:36,861 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:37:36,861 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 00:37:36,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 9820.6ms TimeCoverageRelationStatistics Valid=1988, Invalid=4174, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:37:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 00:37:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-03 00:37:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-03 00:37:36,903 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-03 00:37:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:36,903 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-03 00:37:36,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-03 00:37:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 00:37:36,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:36,904 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:36,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:37:36,904 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:36,904 INFO L82 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 34 times [2021-05-03 00:37:36,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:36,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888715908] [2021-05-03 00:37:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:36,926 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_39) (< v_main_~j~0_668 v_main_~n~0_39)) InVars {main_~n~0=v_main_~n~0_39, main_~j~0=v_main_~j~0_668} OutVars{main_~n~0=v_main_~n~0_39, main_~j~0=v_main_~j~0_668} AuxVars[] AssignedVars[] [2021-05-03 00:37:36,928 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:37:36,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:36,940 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:36,990 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:37:37,028 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:37,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:37,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:38,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:38,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:38,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:39,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:39,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:39,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:40,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:40,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:40,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:40,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:40,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:42,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:42,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:42,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:43,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:43,650 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888715908] [2021-05-03 00:37:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [888715908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:43,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:43,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:37:43,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133744086] [2021-05-03 00:37:43,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:37:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:37:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1125, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:37:43,651 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:43,939 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:37:51,812 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:37:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:52,220 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-03 00:37:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:37:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-03 00:37:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:52,223 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:37:52,223 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:37:52,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 14165.6ms TimeCoverageRelationStatistics Valid=2030, Invalid=4450, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:37:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:37:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-03 00:37:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-03 00:37:52,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-03 00:37:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:52,266 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-03 00:37:52,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-03 00:37:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:37:52,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:52,267 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:52,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:37:52,267 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 35 times [2021-05-03 00:37:52,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:52,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37547254] [2021-05-03 00:37:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:52,274 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_40) (< v_main_~j~0_705 v_main_~n~0_40)) InVars {main_~n~0=v_main_~n~0_40, main_~j~0=v_main_~j~0_705} OutVars{main_~n~0=v_main_~n~0_40, main_~j~0=v_main_~j~0_705} AuxVars[] AssignedVars[] [2021-05-03 00:37:52,277 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:37:52,278 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:52,287 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:52,336 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:37:52,375 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:52,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:52,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:53,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:54,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:54,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:54,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:55,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:55,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:55,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:55,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:55,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:56,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:56,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:57,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:57,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:58,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:58,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:58,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:59,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:59,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:00,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37547254] [2021-05-03 00:38:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [37547254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:00,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:00,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:38:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406053353] [2021-05-03 00:38:00,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:38:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:38:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=1174, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:38:00,081 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:00,390 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 00:38:08,762 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 00:38:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:09,201 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-03 00:38:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 00:38:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-03 00:38:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:09,203 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:38:09,203 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:38:09,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 15734.2ms TimeCoverageRelationStatistics Valid=2141, Invalid=4665, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 00:38:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:38:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-03 00:38:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-03 00:38:09,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-03 00:38:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:09,244 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-03 00:38:09,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-03 00:38:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:38:09,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:09,245 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:09,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:38:09,245 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 36 times [2021-05-03 00:38:09,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:09,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505526934] [2021-05-03 00:38:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:09,252 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_743 v_main_~n~0_41) (< 0 v_main_~n~0_41)) InVars {main_~n~0=v_main_~n~0_41, main_~j~0=v_main_~j~0_743} OutVars{main_~n~0=v_main_~n~0_41, main_~j~0=v_main_~j~0_743} AuxVars[] AssignedVars[] [2021-05-03 00:38:09,254 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:38:09,288 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:09,298 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:09,323 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:38:09,365 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:09,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:09,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:09,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:09,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:10,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:11,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:11,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:11,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:11,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:12,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:13,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:13,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:13,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:14,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:15,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:15,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:15,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:15,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:16,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:17,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:17,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505526934] [2021-05-03 00:38:17,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [505526934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:17,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:17,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:38:17,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328654577] [2021-05-03 00:38:17,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:38:17,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:17,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:38:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=1188, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:38:17,997 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:18,330 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 00:38:27,988 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 00:38:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:28,339 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-03 00:38:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:38:28,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-03 00:38:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:28,341 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:38:28,341 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:38:28,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 17733.2ms TimeCoverageRelationStatistics Valid=2327, Invalid=4813, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 00:38:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:38:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-03 00:38:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-03 00:38:28,386 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-03 00:38:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:28,386 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-03 00:38:28,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-03 00:38:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:38:28,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:28,386 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:28,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:38:28,387 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 37 times [2021-05-03 00:38:28,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:28,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250442262] [2021-05-03 00:38:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:28,394 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_42) (< v_main_~j~0_782 v_main_~n~0_42)) InVars {main_~n~0=v_main_~n~0_42, main_~j~0=v_main_~j~0_782} OutVars{main_~n~0=v_main_~n~0_42, main_~j~0=v_main_~j~0_782} AuxVars[] AssignedVars[] [2021-05-03 00:38:28,397 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:38:28,399 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:28,413 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:28,479 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:38:28,527 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:28,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:28,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:28,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:28,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:29,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:30,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:30,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:30,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:30,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:31,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:31,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:32,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:32,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:32,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:33,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:33,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:34,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:34,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:34,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:35,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:36,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:36,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:37,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:37,806 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250442262] [2021-05-03 00:38:37,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [250442262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:37,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:37,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:38:37,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601293961] [2021-05-03 00:38:37,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:38:37,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:37,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:38:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=1275, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:38:37,808 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:38,129 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:38:48,972 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2021-05-03 00:38:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:49,594 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-03 00:38:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 00:38:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-03 00:38:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:49,599 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:38:49,599 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:38:49,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 19660.3ms TimeCoverageRelationStatistics Valid=2372, Invalid=5110, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 00:38:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:38:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-03 00:38:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-03 00:38:49,668 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-03 00:38:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:49,669 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-03 00:38:49,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-03 00:38:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:38:49,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:49,669 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:49,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 00:38:49,669 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 38 times [2021-05-03 00:38:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:49,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392018284] [2021-05-03 00:38:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:49,686 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_822 v_main_~n~0_43) (< 0 v_main_~n~0_43)) InVars {main_~n~0=v_main_~n~0_43, main_~j~0=v_main_~j~0_822} OutVars{main_~n~0=v_main_~n~0_43, main_~j~0=v_main_~j~0_822} AuxVars[] AssignedVars[] [2021-05-03 00:38:49,703 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:38:49,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:49,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:49,831 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:38:49,896 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:50,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:50,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:51,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:51,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:51,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:52,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:52,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:53,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:54,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:55,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:55,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:56,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:57,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:58,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:58,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:59,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:59,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:00,775 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:00,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392018284] [2021-05-03 00:39:00,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392018284] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:00,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:00,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:39:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589331219] [2021-05-03 00:39:00,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:39:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:39:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=1327, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:39:00,777 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:01,135 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 00:39:13,735 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 00:39:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:14,291 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-03 00:39:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:39:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-03 00:39:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:14,294 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:39:14,295 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:39:14,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 23085.4ms TimeCoverageRelationStatistics Valid=2492, Invalid=5340, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:39:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:39:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-03 00:39:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-03 00:39:14,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-03 00:39:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:14,345 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-03 00:39:14,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-03 00:39:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:39:14,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:14,346 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:14,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 00:39:14,346 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 39 times [2021-05-03 00:39:14,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:14,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116500437] [2021-05-03 00:39:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:14,361 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_863 v_main_~n~0_44) (< 0 v_main_~n~0_44)) InVars {main_~n~0=v_main_~n~0_44, main_~j~0=v_main_~j~0_863} OutVars{main_~n~0=v_main_~n~0_44, main_~j~0=v_main_~j~0_863} AuxVars[] AssignedVars[] [2021-05-03 00:39:14,364 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:39:14,418 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:39:14,431 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:39:14,467 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:39:14,532 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:39:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:14,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:14,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:14,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:15,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:17,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:17,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:17,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:17,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:17,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:18,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:18,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:18,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:19,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:20,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:20,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:21,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:21,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:21,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:22,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:22,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:23,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:24,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:24,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116500437] [2021-05-03 00:39:24,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116500437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:24,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:24,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:39:24,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892626619] [2021-05-03 00:39:24,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:39:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:39:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:39:24,117 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:36,368 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-03 00:39:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:36,895 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-03 00:39:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 00:39:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-03 00:39:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:36,899 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:39:36,899 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:39:36,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 20752.0ms TimeCoverageRelationStatistics Valid=2693, Invalid=5497, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:39:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:39:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-03 00:39:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-03 00:39:36,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-03 00:39:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:36,965 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-03 00:39:36,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-03 00:39:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 00:39:36,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:36,966 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:36,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 00:39:36,966 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:36,967 INFO L82 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 40 times [2021-05-03 00:39:36,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:36,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794892910] [2021-05-03 00:39:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:36,992 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_905 v_main_~n~0_45) (< 0 v_main_~n~0_45)) InVars {main_~n~0=v_main_~n~0_45, main_~j~0=v_main_~j~0_905} OutVars{main_~n~0=v_main_~n~0_45, main_~j~0=v_main_~j~0_905} AuxVars[] AssignedVars[] [2021-05-03 00:39:36,995 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:39:36,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:39:37,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:39:37,113 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:39:37,204 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:39:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:37,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:37,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:37,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:37,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:37,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:38,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:38,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:39,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:39,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:39,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:40,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:40,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:42,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:42,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:43,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:43,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:44,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:47,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:48,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:48,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:51,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:51,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794892910] [2021-05-03 00:39:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794892910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:51,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:39:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022212009] [2021-05-03 00:39:51,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:39:51,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:39:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=1394, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:39:51,232 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:51,673 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:40:07,050 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:40:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:07,521 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-03 00:40:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:40:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-03 00:40:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:07,524 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:40:07,525 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:40:07,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 28644.1ms TimeCoverageRelationStatistics Valid=2821, Invalid=5735, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 00:40:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:40:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-03 00:40:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-03 00:40:07,582 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-03 00:40:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:07,582 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-03 00:40:07,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-03 00:40:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:40:07,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:07,583 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:07,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 00:40:07,583 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:07,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 41 times [2021-05-03 00:40:07,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:07,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282538976] [2021-05-03 00:40:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:07,592 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_46) (< v_main_~j~0_948 v_main_~n~0_46)) InVars {main_~n~0=v_main_~n~0_46, main_~j~0=v_main_~j~0_948} OutVars{main_~n~0=v_main_~n~0_46, main_~j~0=v_main_~j~0_948} AuxVars[] AssignedVars[] [2021-05-03 00:40:07,597 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:40:07,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:40:07,613 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:40:07,690 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:40:07,763 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:40:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:07,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:40:07,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:08,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:09,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:10,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:10,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:10,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:10,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:11,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:11,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:12,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:14,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:14,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:14,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:15,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:15,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:16,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:17,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:17,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:17,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:18,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:18,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:19,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:40:19,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282538976] [2021-05-03 00:40:19,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [282538976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:40:19,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:40:19,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:40:19,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030925838] [2021-05-03 00:40:19,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:40:19,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:40:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:40:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:40:19,327 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:31,226 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-03 00:40:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:31,543 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-03 00:40:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 00:40:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-03 00:40:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:31,547 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:40:31,547 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:40:31,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 22606.8ms TimeCoverageRelationStatistics Valid=2952, Invalid=5978, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 00:40:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:40:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-03 00:40:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-03 00:40:31,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-03 00:40:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:31,619 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-03 00:40:31,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-03 00:40:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-03 00:40:31,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:31,620 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:31,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 00:40:31,620 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 42 times [2021-05-03 00:40:31,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220213649] [2021-05-03 00:40:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:31,630 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_992 v_main_~n~0_47) (< 0 v_main_~n~0_47)) InVars {main_~n~0=v_main_~n~0_47, main_~j~0=v_main_~j~0_992} OutVars{main_~n~0=v_main_~n~0_47, main_~j~0=v_main_~j~0_992} AuxVars[] AssignedVars[] [2021-05-03 00:40:31,632 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:40:31,634 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:40:31,651 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:40:31,761 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:40:31,847 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:40:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:40:32,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:32,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:33,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:33,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:33,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:33,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:34,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:34,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:34,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:35,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:36,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:36,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:37,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:37,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:38,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:38,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:38,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:39,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:40,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:41,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:42,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:42,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:43,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:43,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:44,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:46,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:46,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:47,262 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:40:47,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220213649] [2021-05-03 00:40:47,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220213649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:40:47,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:40:47,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-03 00:40:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051347421] [2021-05-03 00:40:47,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 00:40:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:40:47,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 00:40:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=1545, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:40:47,263 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:47,616 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 00:41:04,878 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 00:41:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:05,406 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-03 00:41:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 00:41:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-03 00:41:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:05,412 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:41:05,412 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:41:05,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 32380.5ms TimeCoverageRelationStatistics Valid=3002, Invalid=6310, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 00:41:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:41:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-03 00:41:05,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-03 00:41:05,478 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-03 00:41:05,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:05,478 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-03 00:41:05,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-03 00:41:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:41:05,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:05,479 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:05,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 00:41:05,479 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:05,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 43 times [2021-05-03 00:41:05,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:05,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903751936] [2021-05-03 00:41:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:05,495 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_48) (< v_main_~j~0_1037 v_main_~n~0_48)) InVars {main_~n~0=v_main_~n~0_48, main_~j~0=v_main_~j~0_1037} OutVars{main_~n~0=v_main_~n~0_48, main_~j~0=v_main_~j~0_1037} AuxVars[] AssignedVars[] [2021-05-03 00:41:05,498 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:41:05,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:41:05,581 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:41:05,626 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:41:05,720 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:41:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:05,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:41:05,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:08,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:08,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:08,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:09,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:10,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:10,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:10,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:10,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:11,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:11,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:12,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:12,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:12,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:13,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:13,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:13,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:14,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:15,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:16,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:16,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:17,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:17,835 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:17,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903751936] [2021-05-03 00:41:17,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [903751936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:17,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:17,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:41:17,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874442205] [2021-05-03 00:41:17,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:41:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:41:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:41:17,836 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:32,043 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:41:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:32,245 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-03 00:41:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 00:41:32,249 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-03 00:41:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:32,250 INFO L225 Difference]: With dead ends: 62 [2021-05-03 00:41:32,250 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:41:32,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 25575.1ms TimeCoverageRelationStatistics Valid=3223, Invalid=6479, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 00:41:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:41:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-03 00:41:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-03 00:41:32,311 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-03 00:41:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:32,311 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-03 00:41:32,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-03 00:41:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:41:32,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:32,312 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:32,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 00:41:32,312 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 44 times [2021-05-03 00:41:32,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:32,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881693240] [2021-05-03 00:41:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:32,322 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_49) (< v_main_~j~0_1083 v_main_~n~0_49)) InVars {main_~n~0=v_main_~n~0_49, main_~j~0=v_main_~j~0_1083} OutVars{main_~n~0=v_main_~n~0_49, main_~j~0=v_main_~j~0_1083} AuxVars[] AssignedVars[] [2021-05-03 00:41:32,340 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:41:32,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:41:32,411 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:41:32,452 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:41:32,540 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:41:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:32,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:41:32,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:32,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:32,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:33,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:34,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:34,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:34,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:35,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:36,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:36,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:36,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:37,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:38,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:38,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:38,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:40,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:40,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:41,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:41,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:41,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:42,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:42,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:43,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:43,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:44,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:45,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:46,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:46,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:46,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881693240] [2021-05-03 00:41:46,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881693240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:46,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:46,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:41:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662116550] [2021-05-03 00:41:46,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:41:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:41:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:41:46,574 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:01,388 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:42:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:01,660 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-03 00:42:01,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:42:01,665 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-03 00:42:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:01,666 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:42:01,666 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:42:01,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 28004.2ms TimeCoverageRelationStatistics Valid=3363, Invalid=6737, Unknown=0, NotChecked=0, Total=10100 [2021-05-03 00:42:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:42:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-03 00:42:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-03 00:42:01,725 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-03 00:42:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-03 00:42:01,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-03 00:42:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 00:42:01,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:01,726 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:01,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 00:42:01,726 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 45 times [2021-05-03 00:42:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:01,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845466074] [2021-05-03 00:42:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:01,738 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1130 v_main_~n~0_50) (< 0 v_main_~n~0_50)) InVars {main_~n~0=v_main_~n~0_50, main_~j~0=v_main_~j~0_1130} OutVars{main_~n~0=v_main_~n~0_50, main_~j~0=v_main_~j~0_1130} AuxVars[] AssignedVars[] [2021-05-03 00:42:01,741 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:42:01,743 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:42:01,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:42:01,854 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:42:01,948 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:42:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:02,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:42:02,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:03,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:04,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:04,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:04,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:04,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:05,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:06,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:07,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:07,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:08,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:08,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:09,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:09,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:10,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:10,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:11,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:12,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:12,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:13,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:15,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:16,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:17,040 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:17,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845466074] [2021-05-03 00:42:17,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [845466074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:17,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:17,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:42:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397732020] [2021-05-03 00:42:17,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:42:17,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:42:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:42:17,042 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:17,363 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:42:34,889 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:42:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:35,289 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-03 00:42:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 00:42:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-03 00:42:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:35,295 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:42:35,295 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:42:35,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 31872.4ms TimeCoverageRelationStatistics Valid=3506, Invalid=7000, Unknown=0, NotChecked=0, Total=10506 [2021-05-03 00:42:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:42:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-03 00:42:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-03 00:42:35,359 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-03 00:42:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:35,360 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-03 00:42:35,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-03 00:42:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-03 00:42:35,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:35,360 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:35,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 00:42:35,360 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 46 times [2021-05-03 00:42:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810782027] [2021-05-03 00:42:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:35,372 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_51) (< v_main_~j~0_1178 v_main_~n~0_51)) InVars {main_~n~0=v_main_~n~0_51, main_~j~0=v_main_~j~0_1178} OutVars{main_~n~0=v_main_~n~0_51, main_~j~0=v_main_~j~0_1178} AuxVars[] AssignedVars[] [2021-05-03 00:42:35,375 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:42:35,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:42:35,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:42:35,537 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:42:35,656 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:42:35,661 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:42:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:35,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:42:35,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:36,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:37,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:38,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:39,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:39,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:39,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:40,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:40,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:41,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:41,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:42,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:42,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:42,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:43,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:45,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:46,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:47,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:47,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:48,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:49,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:50,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:51,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:54,283 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:54,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810782027] [2021-05-03 00:42:54,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [810782027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:54,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:54,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:42:54,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42697965] [2021-05-03 00:42:54,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:42:54,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:54,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:42:54,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=1779, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:42:54,284 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:54,803 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:42:56,771 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:43:17,095 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:43:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:17,802 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-03 00:43:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 00:43:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-03 00:43:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:17,806 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:43:17,806 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 00:43:17,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 40298.7ms TimeCoverageRelationStatistics Valid=3560, Invalid=7360, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 00:43:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 00:43:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-03 00:43:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-03 00:43:17,870 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-03 00:43:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:17,870 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-03 00:43:17,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-03 00:43:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-03 00:43:17,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:17,871 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:17,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 00:43:17,871 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:17,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 47 times [2021-05-03 00:43:17,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:17,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893744876] [2021-05-03 00:43:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:17,889 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_52) (< v_main_~j~0_1227 v_main_~n~0_52)) InVars {main_~n~0=v_main_~n~0_52, main_~j~0=v_main_~j~0_1227} OutVars{main_~n~0=v_main_~n~0_52, main_~j~0=v_main_~j~0_1227} AuxVars[] AssignedVars[] [2021-05-03 00:43:17,892 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:43:17,946 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:43:17,960 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:43:18,001 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:43:18,082 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:43:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:18,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:43:18,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:18,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:19,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:19,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:19,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:19,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:20,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:20,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:21,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:22,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:22,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:23,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:24,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:25,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:26,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:26,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:27,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:27,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:28,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:29,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:29,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:30,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:30,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:31,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:32,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:33,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:33,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:35,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:35,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:36,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:37,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893744876] [2021-05-03 00:43:37,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893744876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:37,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:37,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:43:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834623238] [2021-05-03 00:43:37,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:43:37,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:43:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1240, Invalid=1840, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:43:37,335 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:37,939 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:44:00,027 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:44:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:44:01,003 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-03 00:44:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:44:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-03 00:44:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:44:01,007 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:44:01,008 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:44:01,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 40760.8ms TimeCoverageRelationStatistics Valid=3707, Invalid=7635, Unknown=0, NotChecked=0, Total=11342 [2021-05-03 00:44:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:44:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-03 00:44:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-03 00:44:01,078 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-03 00:44:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:44:01,079 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-03 00:44:01,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-03 00:44:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:44:01,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:01,079 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:01,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 00:44:01,079 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 48 times [2021-05-03 00:44:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:01,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556435846] [2021-05-03 00:44:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:01,089 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1277 v_main_~n~0_53) (< 0 v_main_~n~0_53)) InVars {main_~n~0=v_main_~n~0_53, main_~j~0=v_main_~j~0_1277} OutVars{main_~n~0=v_main_~n~0_53, main_~j~0=v_main_~j~0_1277} AuxVars[] AssignedVars[] [2021-05-03 00:44:01,092 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:44:01,151 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:44:01,167 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:44:01,208 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:44:01,300 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:44:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:01,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:44:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:01,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:01,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:02,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:03,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:04,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:04,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:05,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:06,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:07,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:08,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:08,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:08,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:09,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:10,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:12,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:13,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:13,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:14,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:14,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:15,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:16,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:44:16,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556435846] [2021-05-03 00:44:16,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [556435846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:44:16,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:44:16,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-03 00:44:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906668952] [2021-05-03 00:44:16,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-03 00:44:16,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:44:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-03 00:44:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=1854, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:44:16,775 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:36,153 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:44:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:44:36,925 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-03 00:44:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 00:44:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-03 00:44:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:44:36,931 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:44:36,931 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 00:44:36,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 33465.2ms TimeCoverageRelationStatistics Valid=3953, Invalid=7819, Unknown=0, NotChecked=0, Total=11772 [2021-05-03 00:44:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 00:44:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-03 00:44:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-03 00:44:37,022 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-03 00:44:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:44:37,022 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-03 00:44:37,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-03 00:44:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-03 00:44:37,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:37,023 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:37,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-03 00:44:37,023 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:37,023 INFO L82 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 49 times [2021-05-03 00:44:37,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:37,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437406633] [2021-05-03 00:44:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:37,035 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1328 v_main_~n~0_54) (< 0 v_main_~n~0_54)) InVars {main_~n~0=v_main_~n~0_54, main_~j~0=v_main_~j~0_1328} OutVars{main_~n~0=v_main_~n~0_54, main_~j~0=v_main_~j~0_1328} AuxVars[] AssignedVars[] [2021-05-03 00:44:37,038 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:44:37,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:44:37,141 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:44:37,206 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:44:37,334 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:44:37,340 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:44:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:37,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:44:37,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:37,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:38,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:39,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:39,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:40,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:41,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:41,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:41,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:42,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:42,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:43,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:44,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:44,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:45,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:47,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:48,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:49,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:50,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:52,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:53,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:53,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:54,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:56,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:56,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:58,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:59,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:00,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:01,194 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:01,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437406633] [2021-05-03 00:45:01,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437406633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:01,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:01,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:45:01,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787170175] [2021-05-03 00:45:01,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:45:01,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:45:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1341, Invalid=1965, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:45:01,196 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:01,673 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:45:01,894 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 00:45:02,098 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:02,310 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:02,585 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:02,865 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:03,173 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:03,507 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:03,841 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:04,182 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:04,548 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:05,202 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:05,564 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:05,934 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:06,339 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:06,775 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:07,229 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:08,110 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:08,581 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:09,080 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:09,656 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:10,293 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:10,849 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:11,433 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:12,049 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:12,712 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:13,408 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:14,109 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:14,835 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:15,607 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:16,297 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:17,026 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:18,385 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:19,148 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:19,917 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:20,691 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:22,249 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:23,793 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:24,670 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:25,625 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:26,572 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:27,491 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:28,466 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:29,407 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:45:31,180 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:45:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:31,801 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-03 00:45:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 00:45:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-03 00:45:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:31,806 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:45:31,806 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:45:31,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 52959.6ms TimeCoverageRelationStatistics Valid=4010, Invalid=8200, Unknown=0, NotChecked=0, Total=12210 [2021-05-03 00:45:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:45:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-03 00:45:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-03 00:45:31,879 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-03 00:45:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:31,879 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-03 00:45:31,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-03 00:45:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 00:45:31,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:31,880 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:31,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-03 00:45:31,880 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 50 times [2021-05-03 00:45:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:31,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999551839] [2021-05-03 00:45:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:31,898 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_55) (< v_main_~j~0_1380 v_main_~n~0_55)) InVars {main_~n~0=v_main_~n~0_55, main_~j~0=v_main_~j~0_1380} OutVars{main_~n~0=v_main_~n~0_55, main_~j~0=v_main_~j~0_1380} AuxVars[] AssignedVars[] [2021-05-03 00:45:31,901 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:45:31,903 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:45:31,922 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:45:32,030 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:45:32,145 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 00:45:32,149 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:45:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:32,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:45:32,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:32,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:32,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:32,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:32,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:33,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:34,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:34,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:34,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:34,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:35,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:36,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:37,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:37,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:38,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:39,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:39,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:40,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:41,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:42,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:42,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:43,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:44,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:45,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:46,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:47,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:48,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:48,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:49,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:50,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:51,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:51,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999551839] [2021-05-03 00:45:51,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999551839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:51,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:51,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:45:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327353] [2021-05-03 00:45:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:45:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:51,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:45:51,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=1979, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:45:51,831 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:52,454 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:46:14,471 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:46:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:46:15,243 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-03 00:46:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:46:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-03 00:46:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:46:15,249 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:46:15,250 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:46:15,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 40564.7ms TimeCoverageRelationStatistics Valid=4266, Invalid=8390, Unknown=0, NotChecked=0, Total=12656 [2021-05-03 00:46:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:46:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-03 00:46:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-03 00:46:15,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-03 00:46:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:46:15,329 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-03 00:46:15,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-03 00:46:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:46:15,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:15,329 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:15,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 00:46:15,329 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 51 times [2021-05-03 00:46:15,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:15,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416501567] [2021-05-03 00:46:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:15,340 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1433 v_main_~n~0_56) (< 0 v_main_~n~0_56)) InVars {main_~n~0=v_main_~n~0_56, main_~j~0=v_main_~j~0_1433} OutVars{main_~n~0=v_main_~n~0_56, main_~j~0=v_main_~j~0_1433} AuxVars[] AssignedVars[] [2021-05-03 00:46:15,342 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:46:15,413 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:46:15,434 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:46:15,491 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:46:15,615 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:46:15,620 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:46:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:46:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:46:15,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:17,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:17,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:17,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:19,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:19,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:20,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:20,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:21,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:21,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:22,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:22,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:24,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:24,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:25,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:26,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:27,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:27,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:28,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:30,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:30,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:32,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:33,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:35,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:35,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:36,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:37,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:38,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:38,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:40,096 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:46:40,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416501567] [2021-05-03 00:46:40,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [416501567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:46:40,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:46:40,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-03 00:46:40,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165254578] [2021-05-03 00:46:40,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-03 00:46:40,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:46:40,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-03 00:46:40,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:46:40,097 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:40,690 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 00:47:04,894 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-05-03 00:47:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:47:05,473 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-03 00:47:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 00:47:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-03 00:47:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:47:05,478 INFO L225 Difference]: With dead ends: 70 [2021-05-03 00:47:05,478 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 00:47:05,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 47616.2ms TimeCoverageRelationStatistics Valid=4427, Invalid=8683, Unknown=0, NotChecked=0, Total=13110 [2021-05-03 00:47:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 00:47:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-03 00:47:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:47:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-03 00:47:05,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-03 00:47:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:47:05,549 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-03 00:47:05,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:47:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-03 00:47:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-03 00:47:05,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:47:05,550 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:47:05,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-03 00:47:05,550 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:47:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:47:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 52 times [2021-05-03 00:47:05,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:47:05,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742808550] [2021-05-03 00:47:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:47:05,563 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_57) (< v_main_~j~0_1487 v_main_~n~0_57)) InVars {main_~n~0=v_main_~n~0_57, main_~j~0=v_main_~j~0_1487} OutVars{main_~n~0=v_main_~n~0_57, main_~j~0=v_main_~j~0_1487} AuxVars[] AssignedVars[] [2021-05-03 00:47:05,566 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:47:05,567 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:47:05,582 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:47:05,660 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:47:05,744 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:47:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:47:05,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:47:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:47:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:47:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:06,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:07,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:07,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:07,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:08,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:08,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:08,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:09,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:10,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:10,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:10,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:11,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:11,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:12,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:13,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:13,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:14,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:14,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:15,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:16,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:17,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:18,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:19,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:19,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:20,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:20,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:21,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:22,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:22,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:23,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:24,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:25,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:25,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:26,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:27,346 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:47:27,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742808550] [2021-05-03 00:47:27,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742808550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:47:27,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:47:27,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:47:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129102769] [2021-05-03 00:47:27,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:47:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:47:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:47:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=2160, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:47:27,347 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:47:27,831 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:47:53,065 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:47:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:47:53,851 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-03 00:47:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 00:47:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-03 00:47:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:47:53,855 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:47:53,855 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:47:53,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 46222.1ms TimeCoverageRelationStatistics Valid=4487, Invalid=9085, Unknown=0, NotChecked=0, Total=13572 [2021-05-03 00:47:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:47:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-03 00:47:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:47:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-03 00:47:53,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-05-03 00:47:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:47:53,929 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-03 00:47:53,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:47:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-03 00:47:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:47:53,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:47:53,929 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:47:53,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-03 00:47:53,929 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:47:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:47:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 53 times [2021-05-03 00:47:53,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:47:53,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117963572] [2021-05-03 00:47:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:47:53,939 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< 0 v_main_~n~0_58) (< v_main_~j~0_1542 v_main_~n~0_58)) InVars {main_~n~0=v_main_~n~0_58, main_~j~0=v_main_~j~0_1542} OutVars{main_~n~0=v_main_~n~0_58, main_~j~0=v_main_~j~0_1542} AuxVars[] AssignedVars[] [2021-05-03 00:47:53,941 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:47:53,943 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:47:53,960 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:47:54,046 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:47:54,135 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:47:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:47:54,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:47:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:47:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:47:54,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:54,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:55,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:56,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:56,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:56,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:57,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:57,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:57,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:58,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:59,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:59,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:47:59,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:00,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:00,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:00,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:01,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:01,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:02,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:02,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:03,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:04,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:05,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:06,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:07,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:07,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:08,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:10,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:10,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:48:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117963572] [2021-05-03 00:48:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117963572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:48:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:48:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:48:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163378426] [2021-05-03 00:48:10,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:48:10,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:48:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:48:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:48:10,909 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:48:30,772 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-05-03 00:48:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:48:31,395 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-03 00:48:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:48:31,398 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-03 00:48:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:48:31,399 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:48:31,399 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 00:48:31,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 35263.6ms TimeCoverageRelationStatistics Valid=4758, Invalid=9284, Unknown=0, NotChecked=0, Total=14042 [2021-05-03 00:48:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 00:48:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-03 00:48:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:48:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-03 00:48:31,477 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-05-03 00:48:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:48:31,477 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-03 00:48:31,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:48:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-03 00:48:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:48:31,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:48:31,478 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:48:31,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 00:48:31,478 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:48:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:48:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 54 times [2021-05-03 00:48:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:48:31,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695755448] [2021-05-03 00:48:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:48:31,486 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1598 v_main_~n~0_59) (< 0 v_main_~n~0_59)) InVars {main_~n~0=v_main_~n~0_59, main_~j~0=v_main_~j~0_1598} OutVars{main_~n~0=v_main_~n~0_59, main_~j~0=v_main_~j~0_1598} AuxVars[] AssignedVars[] [2021-05-03 00:48:31,491 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:48:31,552 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:48:31,568 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:48:31,610 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:48:31,702 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:48:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:48:31,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:48:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:48:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:48:31,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:33,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:33,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:33,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:34,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:34,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:35,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:35,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:36,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:36,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:37,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:37,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:37,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:38,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:38,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:39,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:40,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:40,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:41,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:41,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:42,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:43,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:45,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:46,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:47,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:47,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:50,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:51,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:51,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:52,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:54,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:54,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:55,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:48:57,382 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:48:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695755448] [2021-05-03 00:48:57,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [695755448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:48:57,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:48:57,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-03 00:48:57,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190990671] [2021-05-03 00:48:57,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-03 00:48:57,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:48:57,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-03 00:48:57,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1611, Invalid=2295, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:48:57,384 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:48:57,993 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-05-03 00:49:05,598 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:49:11,710 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:49:26,689 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 00:49:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:49:27,667 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-03 00:49:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:49:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-03 00:49:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:49:27,672 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:49:27,672 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:49:27,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 53617.2ms TimeCoverageRelationStatistics Valid=4820, Invalid=9700, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 00:49:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:49:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-03 00:49:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:49:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-03 00:49:27,750 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-05-03 00:49:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:49:27,750 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-03 00:49:27,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:49:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-03 00:49:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:49:27,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:49:27,750 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:49:27,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-03 00:49:27,750 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:49:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:49:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 55 times [2021-05-03 00:49:27,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:49:27,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685373154] [2021-05-03 00:49:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:49:27,760 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~j~0_1655 v_main_~n~0_60) (< 0 v_main_~n~0_60)) InVars {main_~n~0=v_main_~n~0_60, main_~j~0=v_main_~j~0_1655} OutVars{main_~n~0=v_main_~n~0_60, main_~j~0=v_main_~j~0_1655} AuxVars[] AssignedVars[] [2021-05-03 00:49:27,763 WARN L240 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size [2021-05-03 00:49:27,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:49:27,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:49:27,884 WARN L245 tifierPushTermWalker]: treesize reduction 19, result has 77.4 percent of original size 65 [2021-05-03 00:49:27,990 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 00:49:27,994 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:49:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:49:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:49:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:49:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:49:28,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:28,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:29,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:30,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:30,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:30,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:31,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:31,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:31,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:32,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:32,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:33,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:33,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:33,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:33,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:34,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:35,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:35,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:36,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:37,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:37,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:38,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:38,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:39,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:40,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:43,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:44,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:46,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:49:47,564 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:49:47,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685373154] [2021-05-03 00:49:47,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [685373154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:49:47,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:49:47,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:49:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690358800] [2021-05-03 00:49:47,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:49:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:49:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:49:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:49:47,566 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)