/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:03:49,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:03:49,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:03:49,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:03:49,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:03:49,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:03:49,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:03:49,188 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 00:03:49,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:03:49,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:03:49,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:03:49,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:03:49,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:03:49,208 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:03:49,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:03:49,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:03:49,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:03:49,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:03:49,209 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:03:49,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:03:49,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:03:49,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:03:49,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:03:49,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:03:49,484 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:03:49,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-03 00:03:49,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6a5b48b/89660c8a3aa0481c84bac36af7c98ba1/FLAG5281ed448 [2021-05-03 00:03:49,857 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:03:49,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-03 00:03:49,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6a5b48b/89660c8a3aa0481c84bac36af7c98ba1/FLAG5281ed448 [2021-05-03 00:03:50,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d6a5b48b/89660c8a3aa0481c84bac36af7c98ba1 [2021-05-03 00:03:50,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:03:50,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:03:50,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:03:50,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:03:50,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:03:50,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491efe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50, skipping insertion in model container [2021-05-03 00:03:50,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:03:50,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:03:50,380 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2021-05-03 00:03:50,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:03:50,390 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:03:50,397 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2021-05-03 00:03:50,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:03:50,407 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:03:50,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50 WrapperNode [2021-05-03 00:03:50,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:03:50,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:03:50,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:03:50,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:03:50,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (1/1) ... [2021-05-03 00:03:50,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:03:50,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:03:50,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:03:50,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:03:50,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (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 00:03:50,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:03:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:03:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:03:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:03:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:03:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:03:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:03:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:03:50,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:03:50,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:03:50,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:03:50 BoogieIcfgContainer [2021-05-03 00:03:50,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:03:50,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:03:50,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:03:50,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:03:50,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:03:50" (1/3) ... [2021-05-03 00:03:50,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ce103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:03:50, skipping insertion in model container [2021-05-03 00:03:50,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:03:50" (2/3) ... [2021-05-03 00:03:50,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ce103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:03:50, skipping insertion in model container [2021-05-03 00:03:50,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:03:50" (3/3) ... [2021-05-03 00:03:50,664 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2021-05-03 00:03:50,668 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:03:50,670 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:03:50,681 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:03:50,694 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:03:50,694 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:03:50,695 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:03:50,695 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:03:50,695 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:03:50,695 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:03:50,695 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:03:50,695 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:03:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 00:03:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:03:50,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:50,709 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:50,709 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:50,712 INFO L82 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2021-05-03 00:03:50,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:50,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151282471] [2021-05-03 00:03:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:50,754 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:03:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:50,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:50,970 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 00:03:50,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151282471] [2021-05-03 00:03:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151282471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:50,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:03:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056593935] [2021-05-03 00:03:50,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 00:03:50,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 00:03:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:03:50,991 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 00:03:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:51,164 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-03 00:03:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:03:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:03:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:51,174 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:03:51,174 INFO L226 Difference]: Without dead ends: 16 [2021-05-03 00:03:51,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:03:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-03 00:03:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-03 00:03:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-03 00:03:51,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-03 00:03:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:51,210 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-03 00:03:51,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 00:03:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-03 00:03:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:03:51,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:51,212 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:51,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:03:51,212 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2021-05-03 00:03:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254083995] [2021-05-03 00:03:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:51,246 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_7| 2147483648)) (<= |v_main_#t~nondet7_7| 2147483647) (< v_main_~i~0_14 v_~SIZE~0_6) (not (= |v_main_#t~nondet7_7| 0))) InVars {~SIZE~0=v_~SIZE~0_6, main_~i~0=v_main_~i~0_14, main_#t~nondet7=|v_main_#t~nondet7_7|} OutVars{~SIZE~0=v_~SIZE~0_6, main_~i~0=v_main_~i~0_14, main_#t~nondet7=|v_main_#t~nondet7_7|} AuxVars[] AssignedVars[] [2021-05-03 00:03:51,267 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:03:51,301 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:51,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:51,315 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:03:51,323 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:03:51,362 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:03:51,400 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:51,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:51,647 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 00:03:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:51,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:51,882 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254083995] [2021-05-03 00:03:51,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1254083995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:51,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:51,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:03:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307690484] [2021-05-03 00:03:51,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:03:51,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:03:51,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:03:51,884 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 00:03:52,053 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-05-03 00:03:52,170 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 00:03:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:52,270 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-03 00:03:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:03:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) Word has length 14 [2021-05-03 00:03:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:52,271 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:03:52,271 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 00:03:52,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:03:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 00:03:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-03 00:03:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-03 00:03:52,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-03 00:03:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:52,280 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-03 00:03:52,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 00:03:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-03 00:03:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:03:52,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:52,285 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:52,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:03:52,285 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2082915426, now seen corresponding path program 1 times [2021-05-03 00:03:52,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:52,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504082321] [2021-05-03 00:03:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:52,300 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_11| 0) (< v_main_~i~0_18 v_~SIZE~0_7)) InVars {~SIZE~0=v_~SIZE~0_7, main_~i~0=v_main_~i~0_18, main_#t~nondet7=|v_main_#t~nondet7_11|} OutVars{~SIZE~0=v_~SIZE~0_7, main_~i~0=v_main_~i~0_18, main_#t~nondet7=|v_main_#t~nondet7_11|} AuxVars[] AssignedVars[] [2021-05-03 00:03:52,310 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:03:52,328 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:52,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:52,334 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:03:52,339 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:03:52,353 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:03:52,372 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:52,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:52,583 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 00:03:52,737 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:52,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504082321] [2021-05-03 00:03:52,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1504082321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:52,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:52,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:03:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145400307] [2021-05-03 00:03:52,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:03:52,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:03:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:03:52,739 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 00:03:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:53,058 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-05-03 00:03:53,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:03:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) Word has length 14 [2021-05-03 00:03:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:53,058 INFO L225 Difference]: With dead ends: 25 [2021-05-03 00:03:53,059 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 00:03:53,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:03:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 00:03:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-03 00:03:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-03 00:03:53,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-03 00:03:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:53,063 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-03 00:03:53,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 00:03:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-03 00:03:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:03:53,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:53,063 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:53,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:03:53,064 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash -263170305, now seen corresponding path program 2 times [2021-05-03 00:03:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:53,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308715818] [2021-05-03 00:03:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:53,069 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_15| 2147483648)) (<= |v_main_#t~nondet7_15| 2147483647) (< v_main_~i~0_22 v_~SIZE~0_8) (not (= |v_main_#t~nondet7_15| 0))) InVars {~SIZE~0=v_~SIZE~0_8, main_~i~0=v_main_~i~0_22, main_#t~nondet7=|v_main_#t~nondet7_15|} OutVars{~SIZE~0=v_~SIZE~0_8, main_~i~0=v_main_~i~0_22, main_#t~nondet7=|v_main_#t~nondet7_15|} AuxVars[] AssignedVars[] [2021-05-03 00:03:53,073 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:03:53,075 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:53,075 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:53,080 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:03:53,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:03:53,126 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:03:53,155 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:53,156 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:03:53,157 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:53,329 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 00:03:53,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:53,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:53,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:53,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:53,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308715818] [2021-05-03 00:03:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308715818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:53,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:53,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:03:53,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517721200] [2021-05-03 00:03:53,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:03:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:03:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:03:53,552 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:53,732 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-05-03 00:03:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:54,030 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-03 00:03:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:03:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:03:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:54,031 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:03:54,031 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:03:54,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:03:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:03:54,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-05-03 00:03:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 00:03:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-03 00:03:54,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-05-03 00:03:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:54,035 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-03 00:03:54,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-03 00:03:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:03:54,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:54,036 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:54,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:03:54,036 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:54,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1511837057, now seen corresponding path program 1 times [2021-05-03 00:03:54,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:54,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074652062] [2021-05-03 00:03:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:54,053 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_22| 2147483647) (not (= |v_main_#t~nondet7_22| 0)) (< v_main_~i~0_29 v_~SIZE~0_10) (<= 0 (+ |v_main_#t~nondet7_22| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_10, main_~i~0=v_main_~i~0_29, main_#t~nondet7=|v_main_#t~nondet7_22|} OutVars{~SIZE~0=v_~SIZE~0_10, main_~i~0=v_main_~i~0_29, main_#t~nondet7=|v_main_#t~nondet7_22|} AuxVars[] AssignedVars[] [2021-05-03 00:03:54,060 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:03:54,062 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:54,063 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:54,068 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:03:54,073 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:03:54,107 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:03:54,148 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_24| 0) (< v_main_~i~0_31 v_~SIZE~0_11)) InVars {~SIZE~0=v_~SIZE~0_11, main_~i~0=v_main_~i~0_31, main_#t~nondet7=|v_main_#t~nondet7_24|} OutVars{~SIZE~0=v_~SIZE~0_11, main_~i~0=v_main_~i~0_31, main_#t~nondet7=|v_main_#t~nondet7_24|} AuxVars[] AssignedVars[] [2021-05-03 00:03:54,153 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:03:54,165 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:54,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:54,170 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:03:54,180 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:03:54,195 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:03:54,216 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:03:54,217 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:03:54,220 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:03:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:54,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:54,396 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 00:03:54,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:54,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:54,628 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:54,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074652062] [2021-05-03 00:03:54,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074652062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:54,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:54,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:03:54,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344055017] [2021-05-03 00:03:54,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:03:54,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:54,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:03:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:03:54,630 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:54,998 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-03 00:03:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:03:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:03:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:55,004 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:03:55,004 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:03:55,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:03:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:03:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-05-03 00:03:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 00:03:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-03 00:03:55,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-05-03 00:03:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:55,042 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-03 00:03:55,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-03 00:03:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:03:55,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:55,045 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:55,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:03:55,045 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:55,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:55,046 INFO L82 PathProgramCache]: Analyzing trace with hash 416888065, now seen corresponding path program 2 times [2021-05-03 00:03:55,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:55,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395731499] [2021-05-03 00:03:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:55,054 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_39 v_~SIZE~0_13) (<= 0 (+ |v_main_#t~nondet7_32| 2147483648)) (not (= |v_main_#t~nondet7_32| 0)) (<= |v_main_#t~nondet7_32| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_13, main_~i~0=v_main_~i~0_39, main_#t~nondet7=|v_main_#t~nondet7_32|} OutVars{~SIZE~0=v_~SIZE~0_13, main_~i~0=v_main_~i~0_39, main_#t~nondet7=|v_main_#t~nondet7_32|} AuxVars[] AssignedVars[] [2021-05-03 00:03:55,058 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:03:55,060 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:55,061 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:55,083 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:03:55,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:03:55,128 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:03:55,163 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_41 v_~SIZE~0_14) (= |v_main_#t~nondet7_34| 0)) InVars {~SIZE~0=v_~SIZE~0_14, main_~i~0=v_main_~i~0_41, main_#t~nondet7=|v_main_#t~nondet7_34|} OutVars{~SIZE~0=v_~SIZE~0_14, main_~i~0=v_main_~i~0_41, main_#t~nondet7=|v_main_#t~nondet7_34|} AuxVars[] AssignedVars[] [2021-05-03 00:03:55,167 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:03:55,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:55,170 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:55,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:03:55,178 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:03:55,203 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:03:55,225 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:03:55,226 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:03:55,226 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:03:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:55,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:55,433 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 00:03:55,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:55,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:03:55,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395731499] [2021-05-03 00:03:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [395731499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:55,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:55,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:03:55,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596163281] [2021-05-03 00:03:55,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:03:55,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:55,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:03:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:03:55,825 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:56,741 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-05-03 00:03:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:03:56,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:03:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:56,742 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:03:56,742 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:03:56,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1103.4ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:03:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:03:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-05-03 00:03:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 00:03:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-03 00:03:56,747 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-05-03 00:03:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:56,747 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-03 00:03:56,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-03 00:03:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:03:56,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:56,747 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:56,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:03:56,747 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2103071869, now seen corresponding path program 2 times [2021-05-03 00:03:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:56,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910369688] [2021-05-03 00:03:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:56,752 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_42| 0) (< v_main_~i~0_49 v_~SIZE~0_16)) InVars {~SIZE~0=v_~SIZE~0_16, main_~i~0=v_main_~i~0_49, main_#t~nondet7=|v_main_#t~nondet7_42|} OutVars{~SIZE~0=v_~SIZE~0_16, main_~i~0=v_main_~i~0_49, main_#t~nondet7=|v_main_#t~nondet7_42|} AuxVars[] AssignedVars[] [2021-05-03 00:03:56,754 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:03:56,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:56,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:56,759 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:03:56,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:03:56,788 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:03:56,807 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:56,807 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:03:56,808 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:56,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:56,918 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 00:03:57,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:03:57,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910369688] [2021-05-03 00:03:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [910369688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:03:57,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:03:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:03:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206573853] [2021-05-03 00:03:57,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:03:57,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:03:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:03:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:03:57,088 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:03:57,480 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-05-03 00:03:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:03:57,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:03:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:03:57,481 INFO L225 Difference]: With dead ends: 31 [2021-05-03 00:03:57,481 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:03:57,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:03:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:03:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-05-03 00:03:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 00:03:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-03 00:03:57,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-05-03 00:03:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:03:57,485 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-03 00:03:57,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:03:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-03 00:03:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:03:57,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:03:57,486 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:03:57,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:03:57,486 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:03:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:03:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1140259874, now seen corresponding path program 3 times [2021-05-03 00:03:57,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:03:57,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311804600] [2021-05-03 00:03:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:03:57,492 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_56 v_~SIZE~0_18) (<= 0 (+ |v_main_#t~nondet7_49| 2147483648)) (not (= |v_main_#t~nondet7_49| 0)) (<= |v_main_#t~nondet7_49| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_18, main_~i~0=v_main_~i~0_56, main_#t~nondet7=|v_main_#t~nondet7_49|} OutVars{~SIZE~0=v_~SIZE~0_18, main_~i~0=v_main_~i~0_56, main_#t~nondet7=|v_main_#t~nondet7_49|} AuxVars[] AssignedVars[] [2021-05-03 00:03:57,494 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:03:57,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:57,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:03:57,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:03:57,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:03:57,543 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:03:57,572 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:57,572 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:03:57,573 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:03:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:57,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:03:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:03:57,681 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 00:03:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:00,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:00,166 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311804600] [2021-05-03 00:04:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311804600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:00,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:00,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337052780] [2021-05-03 00:04:00,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:04:00,168 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:00,348 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-05-03 00:04:00,488 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 00:04:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:00,778 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-03 00:04:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:04:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:00,779 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:04:00,779 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:04:00,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2907.9ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:04:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:04:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-03 00:04:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:04:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-05-03 00:04:00,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-05-03 00:04:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:00,785 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-05-03 00:04:00,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-05-03 00:04:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:04:00,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:00,785 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:00,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:04:00,785 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1379700060, now seen corresponding path program 3 times [2021-05-03 00:04:00,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:00,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838357978] [2021-05-03 00:04:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:00,791 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_57| 2147483647) (<= 0 (+ |v_main_#t~nondet7_57| 2147483648)) (not (= |v_main_#t~nondet7_57| 0)) (< v_main_~i~0_64 v_~SIZE~0_20)) InVars {~SIZE~0=v_~SIZE~0_20, main_~i~0=v_main_~i~0_64, main_#t~nondet7=|v_main_#t~nondet7_57|} OutVars{~SIZE~0=v_~SIZE~0_20, main_~i~0=v_main_~i~0_64, main_#t~nondet7=|v_main_#t~nondet7_57|} AuxVars[] AssignedVars[] [2021-05-03 00:04:00,794 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:00,817 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:00,818 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:00,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:00,829 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:00,855 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:00,902 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_66 v_~SIZE~0_21) (= |v_main_#t~nondet7_59| 0)) InVars {~SIZE~0=v_~SIZE~0_21, main_~i~0=v_main_~i~0_66, main_#t~nondet7=|v_main_#t~nondet7_59|} OutVars{~SIZE~0=v_~SIZE~0_21, main_~i~0=v_main_~i~0_66, main_#t~nondet7=|v_main_#t~nondet7_59|} AuxVars[] AssignedVars[] [2021-05-03 00:04:00,904 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:00,905 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:00,905 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:00,910 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:00,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:00,945 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:00,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:00,970 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:00,971 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:01,105 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 00:04:01,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:01,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:05,217 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-05-03 00:04:07,323 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 00:04:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:11,469 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-03 00:04:11,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:11,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:11,614 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838357978] [2021-05-03 00:04:11,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838357978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:11,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:11,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:11,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454442253] [2021-05-03 00:04:11,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:11,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:11,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:11,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:04:11,616 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:15,873 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2021-05-03 00:04:20,099 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-05-03 00:04:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:20,389 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-03 00:04:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:04:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:20,390 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:04:20,390 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:04:20,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 15035.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:04:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:04:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-03 00:04:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:04:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-05-03 00:04:20,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-05-03 00:04:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:20,395 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-05-03 00:04:20,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-05-03 00:04:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:04:20,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:20,395 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:20,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:04:20,396 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1820318244, now seen corresponding path program 4 times [2021-05-03 00:04:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:20,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374731039] [2021-05-03 00:04:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:20,407 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_68| 2147483647) (not (= |v_main_#t~nondet7_68| 0)) (< v_main_~i~0_75 v_~SIZE~0_23) (<= 0 (+ |v_main_#t~nondet7_68| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_23, main_~i~0=v_main_~i~0_75, main_#t~nondet7=|v_main_#t~nondet7_68|} OutVars{~SIZE~0=v_~SIZE~0_23, main_~i~0=v_main_~i~0_75, main_#t~nondet7=|v_main_#t~nondet7_68|} AuxVars[] AssignedVars[] [2021-05-03 00:04:20,409 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:20,431 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:20,432 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:20,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:20,445 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:20,477 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:20,515 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_77 v_~SIZE~0_24) (= |v_main_#t~nondet7_70| 0)) InVars {~SIZE~0=v_~SIZE~0_24, main_~i~0=v_main_~i~0_77, main_#t~nondet7=|v_main_#t~nondet7_70|} OutVars{~SIZE~0=v_~SIZE~0_24, main_~i~0=v_main_~i~0_77, main_#t~nondet7=|v_main_#t~nondet7_70|} AuxVars[] AssignedVars[] [2021-05-03 00:04:20,517 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:20,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:20,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:20,523 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:20,536 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:20,566 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:20,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:20,591 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:20,592 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:20,592 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:20,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:04:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:24,682 WARN L205 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-05-03 00:04:26,363 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 00:04:26,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:29,463 WARN L205 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2021-05-03 00:04:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:29,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:29,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374731039] [2021-05-03 00:04:29,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374731039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:29,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:29,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:29,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464361968] [2021-05-03 00:04:29,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:29,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:04:29,628 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:31,463 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 125 [2021-05-03 00:04:33,439 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 00:04:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:33,757 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-03 00:04:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:04:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:33,763 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:04:33,763 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:04:33,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 8962.4ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:04:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:04:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-05-03 00:04:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 00:04:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-05-03 00:04:33,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2021-05-03 00:04:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:33,769 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-05-03 00:04:33,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-05-03 00:04:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:04:33,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:33,770 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:33,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:04:33,770 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -699641690, now seen corresponding path program 5 times [2021-05-03 00:04:33,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:33,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364267609] [2021-05-03 00:04:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:33,778 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_81| 0)) (<= |v_main_#t~nondet7_81| 2147483647) (< v_main_~i~0_88 v_~SIZE~0_27) (<= 0 (+ |v_main_#t~nondet7_81| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_27, main_~i~0=v_main_~i~0_88, main_#t~nondet7=|v_main_#t~nondet7_81|} OutVars{~SIZE~0=v_~SIZE~0_27, main_~i~0=v_main_~i~0_88, main_#t~nondet7=|v_main_#t~nondet7_81|} AuxVars[] AssignedVars[] [2021-05-03 00:04:33,780 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:33,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:33,805 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:33,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:33,818 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:33,850 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:33,908 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_83| 0) (< v_main_~i~0_90 v_~SIZE~0_28)) InVars {~SIZE~0=v_~SIZE~0_28, main_~i~0=v_main_~i~0_90, main_#t~nondet7=|v_main_#t~nondet7_83|} OutVars{~SIZE~0=v_~SIZE~0_28, main_~i~0=v_main_~i~0_90, main_#t~nondet7=|v_main_#t~nondet7_83|} AuxVars[] AssignedVars[] [2021-05-03 00:04:33,910 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:33,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:33,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:33,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:33,924 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:33,957 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:33,982 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:33,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:33,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:33,984 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:34,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:34,148 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 00:04:34,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:34,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:34,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:34,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364267609] [2021-05-03 00:04:34,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [364267609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:34,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:34,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:34,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363969380] [2021-05-03 00:04:34,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:34,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:04:34,467 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:34,943 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-03 00:04:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:04:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:34,944 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:04:34,944 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:04:34,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:04:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:04:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-05-03 00:04:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:04:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-05-03 00:04:34,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-05-03 00:04:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:34,950 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-05-03 00:04:34,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-05-03 00:04:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:04:34,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:34,950 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:34,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:04:34,950 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -678635482, now seen corresponding path program 6 times [2021-05-03 00:04:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:34,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917018153] [2021-05-03 00:04:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:34,960 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_94| 2147483648)) (<= |v_main_#t~nondet7_94| 2147483647) (not (= |v_main_#t~nondet7_94| 0)) (< v_main_~i~0_101 v_~SIZE~0_31)) InVars {~SIZE~0=v_~SIZE~0_31, main_~i~0=v_main_~i~0_101, main_#t~nondet7=|v_main_#t~nondet7_94|} OutVars{~SIZE~0=v_~SIZE~0_31, main_~i~0=v_main_~i~0_101, main_#t~nondet7=|v_main_#t~nondet7_94|} AuxVars[] AssignedVars[] [2021-05-03 00:04:34,962 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:34,988 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:34,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:34,995 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:35,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:35,030 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:35,070 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_96| 0) (< v_main_~i~0_103 v_~SIZE~0_32)) InVars {~SIZE~0=v_~SIZE~0_32, main_~i~0=v_main_~i~0_103, main_#t~nondet7=|v_main_#t~nondet7_96|} OutVars{~SIZE~0=v_~SIZE~0_32, main_~i~0=v_main_~i~0_103, main_#t~nondet7=|v_main_#t~nondet7_96|} AuxVars[] AssignedVars[] [2021-05-03 00:04:35,072 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:35,073 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:35,073 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:35,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:35,084 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:35,119 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:35,143 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:35,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:35,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:35,145 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:35,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:35,319 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 00:04:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:35,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:35,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:35,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:35,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917018153] [2021-05-03 00:04:35,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [917018153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:35,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:35,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:35,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73157962] [2021-05-03 00:04:35,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:35,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:04:35,710 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:36,757 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-03 00:04:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:04:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:36,758 INFO L225 Difference]: With dead ends: 37 [2021-05-03 00:04:36,758 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:04:36,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1227.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:04:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:04:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-05-03 00:04:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 00:04:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-05-03 00:04:36,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2021-05-03 00:04:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:36,764 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-05-03 00:04:36,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-05-03 00:04:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:04:36,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:36,765 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:36,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:04:36,765 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:36,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1773584474, now seen corresponding path program 7 times [2021-05-03 00:04:36,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:36,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602425574] [2021-05-03 00:04:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:36,780 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_114 v_~SIZE~0_35) (<= |v_main_#t~nondet7_107| 2147483647) (<= 0 (+ |v_main_#t~nondet7_107| 2147483648)) (not (= |v_main_#t~nondet7_107| 0))) InVars {~SIZE~0=v_~SIZE~0_35, main_~i~0=v_main_~i~0_114, main_#t~nondet7=|v_main_#t~nondet7_107|} OutVars{~SIZE~0=v_~SIZE~0_35, main_~i~0=v_main_~i~0_114, main_#t~nondet7=|v_main_#t~nondet7_107|} AuxVars[] AssignedVars[] [2021-05-03 00:04:36,782 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:36,786 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:36,786 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:36,793 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:36,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:36,865 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:36,910 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_116 v_~SIZE~0_36) (= |v_main_#t~nondet7_109| 0)) InVars {~SIZE~0=v_~SIZE~0_36, main_~i~0=v_main_~i~0_116, main_#t~nondet7=|v_main_#t~nondet7_109|} OutVars{~SIZE~0=v_~SIZE~0_36, main_~i~0=v_main_~i~0_116, main_#t~nondet7=|v_main_#t~nondet7_109|} AuxVars[] AssignedVars[] [2021-05-03 00:04:36,912 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:36,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:36,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:36,918 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:36,925 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:36,957 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:36,983 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:36,984 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:36,984 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:04:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:37,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:41,271 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:04:43,352 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 00:04:43,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:47,393 WARN L205 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-05-03 00:04:47,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:47,616 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602425574] [2021-05-03 00:04:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [602425574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:47,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:47,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:04:47,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221895263] [2021-05-03 00:04:47,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:04:47,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:04:47,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:04:47,617 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:49,789 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 00:04:55,017 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2021-05-03 00:04:55,217 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 62 [2021-05-03 00:04:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:55,292 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-03 00:04:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:04:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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) Word has length 18 [2021-05-03 00:04:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:55,293 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:04:55,293 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:04:55,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 9771.5ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:04:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:04:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-05-03 00:04:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 00:04:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-05-03 00:04:55,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2021-05-03 00:04:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:55,300 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-05-03 00:04:55,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 12 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 00:04:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-05-03 00:04:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:04:55,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:55,300 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:55,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:04:55,300 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1896989319, now seen corresponding path program 8 times [2021-05-03 00:04:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807113280] [2021-05-03 00:04:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:55,313 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_125 v_~SIZE~0_38) (<= |v_main_#t~nondet7_118| 2147483647) (not (= |v_main_#t~nondet7_118| 0)) (<= 0 (+ |v_main_#t~nondet7_118| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_38, main_~i~0=v_main_~i~0_125, main_#t~nondet7=|v_main_#t~nondet7_118|} OutVars{~SIZE~0=v_~SIZE~0_38, main_~i~0=v_main_~i~0_125, main_#t~nondet7=|v_main_#t~nondet7_118|} AuxVars[] AssignedVars[] [2021-05-03 00:04:55,315 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:55,342 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:55,343 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:55,349 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:55,356 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:55,393 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:55,437 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_127 v_~SIZE~0_39) (= |v_main_#t~nondet7_120| 0)) InVars {~SIZE~0=v_~SIZE~0_39, main_~i~0=v_main_~i~0_127, main_#t~nondet7=|v_main_#t~nondet7_120|} OutVars{~SIZE~0=v_~SIZE~0_39, main_~i~0=v_main_~i~0_127, main_#t~nondet7=|v_main_#t~nondet7_120|} AuxVars[] AssignedVars[] [2021-05-03 00:04:55,438 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:55,439 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:55,439 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:55,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:55,449 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:55,493 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:55,517 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:55,517 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:55,518 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:55,519 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:55,757 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 00:04:55,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:55,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:55,896 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2021-05-03 00:04:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:56,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:56,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:56,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:04:56,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807113280] [2021-05-03 00:04:56,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [807113280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:04:56,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:04:56,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:04:56,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959684317] [2021-05-03 00:04:56,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:04:56,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:04:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:04:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:04:56,210 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:04:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:04:56,794 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-05-03 00:04:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:04:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:04:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:04:56,795 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:04:56,795 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:04:56,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 852.5ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:04:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:04:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-05-03 00:04:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 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 00:04:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-05-03 00:04:56,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 20 [2021-05-03 00:04:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:04:56,801 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-05-03 00:04:56,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:04:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-05-03 00:04:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:04:56,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:04:56,802 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:04:56,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:04:56,802 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:04:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:04:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1917995527, now seen corresponding path program 9 times [2021-05-03 00:04:56,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:04:56,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165900635] [2021-05-03 00:04:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:04:56,832 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_139 v_~SIZE~0_42) (<= 0 (+ |v_main_#t~nondet7_132| 2147483648)) (<= |v_main_#t~nondet7_132| 2147483647) (not (= |v_main_#t~nondet7_132| 0))) InVars {~SIZE~0=v_~SIZE~0_42, main_~i~0=v_main_~i~0_139, main_#t~nondet7=|v_main_#t~nondet7_132|} OutVars{~SIZE~0=v_~SIZE~0_42, main_~i~0=v_main_~i~0_139, main_#t~nondet7=|v_main_#t~nondet7_132|} AuxVars[] AssignedVars[] [2021-05-03 00:04:56,834 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:04:56,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:56,836 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:56,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:04:56,850 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:04:56,904 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:04:56,949 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_141 v_~SIZE~0_43) (= |v_main_#t~nondet7_134| 0)) InVars {~SIZE~0=v_~SIZE~0_43, main_~i~0=v_main_~i~0_141, main_#t~nondet7=|v_main_#t~nondet7_134|} OutVars{~SIZE~0=v_~SIZE~0_43, main_~i~0=v_main_~i~0_141, main_#t~nondet7=|v_main_#t~nondet7_134|} AuxVars[] AssignedVars[] [2021-05-03 00:04:56,951 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:04:56,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:56,967 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:04:56,973 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:04:56,979 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:04:56,995 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:04:57,022 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:57,022 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:57,023 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:04:57,024 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:04:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:57,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:04:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:04:57,205 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 00:04:57,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:04:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:01,328 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:05:03,413 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 00:05:03,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:03,558 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-05-03 00:05:03,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:03,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:03,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:03,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165900635] [2021-05-03 00:05:03,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165900635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:03,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:03,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:05:03,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274190393] [2021-05-03 00:05:03,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:05:03,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:03,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:05:03,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:05:03,785 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:05,991 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 00:05:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:05:06,563 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-03 00:05:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:05:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:05:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:05:06,564 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:05:06,564 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:05:06,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5073.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:05:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:05:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-03 00:05:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 00:05:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-03 00:05:06,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2021-05-03 00:05:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:05:06,571 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-03 00:05:06,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-03 00:05:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:05:06,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:05:06,572 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:05:06,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:05:06,572 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:05:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:05:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -601964407, now seen corresponding path program 10 times [2021-05-03 00:05:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:05:06,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126659643] [2021-05-03 00:05:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:05:06,582 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_146| 0)) (<= |v_main_#t~nondet7_146| 2147483647) (< v_main_~i~0_153 v_~SIZE~0_46) (<= 0 (+ |v_main_#t~nondet7_146| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_46, main_~i~0=v_main_~i~0_153, main_#t~nondet7=|v_main_#t~nondet7_146|} OutVars{~SIZE~0=v_~SIZE~0_46, main_~i~0=v_main_~i~0_153, main_#t~nondet7=|v_main_#t~nondet7_146|} AuxVars[] AssignedVars[] [2021-05-03 00:05:06,584 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:05:06,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:06,611 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:06,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:05:06,626 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:05:06,663 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:05:06,713 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_148| 0) (< v_main_~i~0_155 v_~SIZE~0_47)) InVars {~SIZE~0=v_~SIZE~0_47, main_~i~0=v_main_~i~0_155, main_#t~nondet7=|v_main_#t~nondet7_148|} OutVars{~SIZE~0=v_~SIZE~0_47, main_~i~0=v_main_~i~0_155, main_#t~nondet7=|v_main_#t~nondet7_148|} AuxVars[] AssignedVars[] [2021-05-03 00:05:06,715 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:05:06,749 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:06,749 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:06,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:05:06,762 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:05:06,783 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:05:06,812 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:06,813 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:06,813 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:06,814 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:07,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:05:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:07,035 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 00:05:07,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:07,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:07,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:07,458 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:07,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126659643] [2021-05-03 00:05:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126659643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:07,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:07,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:05:07,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858275024] [2021-05-03 00:05:07,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:05:07,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:05:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:05:07,460 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:05:08,082 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-03 00:05:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:05:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:05:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:05:08,084 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:05:08,084 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:05:08,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:05:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:05:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-03 00:05:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 00:05:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-03 00:05:08,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2021-05-03 00:05:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:05:08,094 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-03 00:05:08,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-03 00:05:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:05:08,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:05:08,095 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:05:08,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:05:08,096 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:05:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:05:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1310183305, now seen corresponding path program 11 times [2021-05-03 00:05:08,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:05:08,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820659128] [2021-05-03 00:05:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:05:08,106 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_160| 2147483648)) (not (= |v_main_#t~nondet7_160| 0)) (< v_main_~i~0_167 v_~SIZE~0_50) (<= |v_main_#t~nondet7_160| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_50, main_~i~0=v_main_~i~0_167, main_#t~nondet7=|v_main_#t~nondet7_160|} OutVars{~SIZE~0=v_~SIZE~0_50, main_~i~0=v_main_~i~0_167, main_#t~nondet7=|v_main_#t~nondet7_160|} AuxVars[] AssignedVars[] [2021-05-03 00:05:08,108 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:05:08,109 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:08,109 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:08,117 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:05:08,134 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:05:08,199 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:05:08,240 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_162| 0) (< v_main_~i~0_169 v_~SIZE~0_51)) InVars {~SIZE~0=v_~SIZE~0_51, main_~i~0=v_main_~i~0_169, main_#t~nondet7=|v_main_#t~nondet7_162|} OutVars{~SIZE~0=v_~SIZE~0_51, main_~i~0=v_main_~i~0_169, main_#t~nondet7=|v_main_#t~nondet7_162|} AuxVars[] AssignedVars[] [2021-05-03 00:05:08,242 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:05:08,243 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:08,244 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:08,249 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:05:08,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:05:08,282 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:05:08,310 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:08,311 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:08,311 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:08,312 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:08,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:05:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:05:08,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:09,103 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:09,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820659128] [2021-05-03 00:05:09,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [820659128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:09,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:09,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:05:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451285329] [2021-05-03 00:05:09,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:05:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:05:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:05:09,104 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:11,144 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2021-05-03 00:05:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:05:11,159 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-03 00:05:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:05:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:05:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:05:11,160 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:05:11,160 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:05:11,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2328.6ms TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:05:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:05:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 00:05:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 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 00:05:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-03 00:05:11,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2021-05-03 00:05:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:05:11,168 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-03 00:05:11,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-03 00:05:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:05:11,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:05:11,169 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:05:11,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:05:11,169 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:05:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:05:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2011247883, now seen corresponding path program 12 times [2021-05-03 00:05:11,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:05:11,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058400750] [2021-05-03 00:05:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:05:11,180 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_174| 2147483647) (< v_main_~i~0_181 v_~SIZE~0_54) (<= 0 (+ |v_main_#t~nondet7_174| 2147483648)) (not (= |v_main_#t~nondet7_174| 0))) InVars {~SIZE~0=v_~SIZE~0_54, main_~i~0=v_main_~i~0_181, main_#t~nondet7=|v_main_#t~nondet7_174|} OutVars{~SIZE~0=v_~SIZE~0_54, main_~i~0=v_main_~i~0_181, main_#t~nondet7=|v_main_#t~nondet7_174|} AuxVars[] AssignedVars[] [2021-05-03 00:05:11,187 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:05:11,188 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:11,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:11,195 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:05:11,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:05:11,255 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:05:11,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_183 v_~SIZE~0_55) (= |v_main_#t~nondet7_176| 0)) InVars {~SIZE~0=v_~SIZE~0_55, main_~i~0=v_main_~i~0_183, main_#t~nondet7=|v_main_#t~nondet7_176|} OutVars{~SIZE~0=v_~SIZE~0_55, main_~i~0=v_main_~i~0_183, main_#t~nondet7=|v_main_#t~nondet7_176|} AuxVars[] AssignedVars[] [2021-05-03 00:05:11,312 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:05:11,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:11,330 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:11,335 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:05:11,344 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:05:11,360 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:05:11,387 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:11,388 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:11,388 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:11,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:05:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:11,572 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 00:05:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:11,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:15,698 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:05:17,814 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 00:05:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:18,777 WARN L205 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-05-03 00:05:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:19,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:19,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058400750] [2021-05-03 00:05:19,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058400750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:19,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:19,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:05:19,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62119776] [2021-05-03 00:05:19,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:05:19,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:05:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:05:19,134 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:22,352 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-05-03 00:05:22,496 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:05:23,348 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-05-03 00:05:23,621 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 00:05:24,621 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 56 [2021-05-03 00:05:24,988 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 59 [2021-05-03 00:05:25,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:05:25,179 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-03 00:05:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:05:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:05:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:05:25,181 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:05:25,181 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:05:25,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 9205.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:05:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:05:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-05-03 00:05:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 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 00:05:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-05-03 00:05:25,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 20 [2021-05-03 00:05:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:05:25,202 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-05-03 00:05:25,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:05:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-05-03 00:05:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:05:25,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:05:25,203 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:05:25,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:05:25,203 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:05:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:05:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1731518934, now seen corresponding path program 13 times [2021-05-03 00:05:25,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:05:25,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120499247] [2021-05-03 00:05:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:05:25,212 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_186| 2147483648)) (< v_main_~i~0_193 v_~SIZE~0_57) (<= |v_main_#t~nondet7_186| 2147483647) (not (= |v_main_#t~nondet7_186| 0))) InVars {~SIZE~0=v_~SIZE~0_57, main_~i~0=v_main_~i~0_193, main_#t~nondet7=|v_main_#t~nondet7_186|} OutVars{~SIZE~0=v_~SIZE~0_57, main_~i~0=v_main_~i~0_193, main_#t~nondet7=|v_main_#t~nondet7_186|} AuxVars[] AssignedVars[] [2021-05-03 00:05:25,214 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:05:25,238 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:25,239 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:25,246 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:05:25,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:05:25,281 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:05:25,324 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_195 v_~SIZE~0_58) (= |v_main_#t~nondet7_188| 0)) InVars {~SIZE~0=v_~SIZE~0_58, main_~i~0=v_main_~i~0_195, main_#t~nondet7=|v_main_#t~nondet7_188|} OutVars{~SIZE~0=v_~SIZE~0_58, main_~i~0=v_main_~i~0_195, main_#t~nondet7=|v_main_#t~nondet7_188|} AuxVars[] AssignedVars[] [2021-05-03 00:05:25,325 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:05:25,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:25,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:25,331 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:05:25,337 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:05:25,374 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:05:25,402 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:25,402 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:25,403 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:25,404 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:25,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:05:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:25,593 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 00:05:25,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:25,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:29,706 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 00:05:31,796 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:05:31,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:35,924 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-05-03 00:05:35,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:36,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:36,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:36,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:36,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120499247] [2021-05-03 00:05:36,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1120499247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:36,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:36,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:05:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722876223] [2021-05-03 00:05:36,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:05:36,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:05:36,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:05:36,259 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:05:38,466 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 108 [2021-05-03 00:05:40,597 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 00:05:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:05:41,215 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-03 00:05:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:05:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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) Word has length 22 [2021-05-03 00:05:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:05:41,216 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:05:41,216 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:05:41,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 11276.7ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:05:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:05:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-05-03 00:05:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 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 00:05:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-03 00:05:41,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2021-05-03 00:05:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:05:41,224 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-03 00:05:41,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:05:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-03 00:05:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:05:41,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:05:41,225 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:05:41,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:05:41,225 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:05:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:05:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1710512726, now seen corresponding path program 14 times [2021-05-03 00:05:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:05:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644896529] [2021-05-03 00:05:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:05:41,233 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_201| 0)) (<= 0 (+ |v_main_#t~nondet7_201| 2147483648)) (<= |v_main_#t~nondet7_201| 2147483647) (< v_main_~i~0_208 v_~SIZE~0_61)) InVars {~SIZE~0=v_~SIZE~0_61, main_~i~0=v_main_~i~0_208, main_#t~nondet7=|v_main_#t~nondet7_201|} OutVars{~SIZE~0=v_~SIZE~0_61, main_~i~0=v_main_~i~0_208, main_#t~nondet7=|v_main_#t~nondet7_201|} AuxVars[] AssignedVars[] [2021-05-03 00:05:41,235 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:05:41,262 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:41,263 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:41,269 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:05:41,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:05:41,311 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:05:41,360 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_210 v_~SIZE~0_62) (= |v_main_#t~nondet7_203| 0)) InVars {~SIZE~0=v_~SIZE~0_62, main_~i~0=v_main_~i~0_210, main_#t~nondet7=|v_main_#t~nondet7_203|} OutVars{~SIZE~0=v_~SIZE~0_62, main_~i~0=v_main_~i~0_210, main_#t~nondet7=|v_main_#t~nondet7_203|} AuxVars[] AssignedVars[] [2021-05-03 00:05:41,361 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:05:41,362 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:41,364 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:05:41,372 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:05:41,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:05:41,417 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:05:41,453 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:41,453 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:41,454 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:05:41,455 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:05:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:41,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:05:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:05:41,592 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 00:05:41,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:45,727 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 00:05:47,821 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:05:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:51,941 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-05-03 00:05:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:52,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:52,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:05:52,265 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:05:52,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644896529] [2021-05-03 00:05:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [644896529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:05:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:05:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:05:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701413154] [2021-05-03 00:05:52,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:05:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:05:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:05:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:05:52,267 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:05:56,557 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-05-03 00:06:00,773 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-05-03 00:06:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:01,368 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-05-03 00:06:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:06:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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) Word has length 22 [2021-05-03 00:06:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:01,369 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:06:01,369 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:06:01,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 15400.8ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:06:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:06:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-03 00:06:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 32 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 00:06:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-03 00:06:01,379 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 22 [2021-05-03 00:06:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:01,379 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-03 00:06:01,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-03 00:06:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:06:01,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:01,380 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:01,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:06:01,380 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash 64494636, now seen corresponding path program 15 times [2021-05-03 00:06:01,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:01,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821205529] [2021-05-03 00:06:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:01,394 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_216| 2147483648)) (< v_main_~i~0_223 v_~SIZE~0_65) (<= |v_main_#t~nondet7_216| 2147483647) (not (= |v_main_#t~nondet7_216| 0))) InVars {~SIZE~0=v_~SIZE~0_65, main_~i~0=v_main_~i~0_223, main_#t~nondet7=|v_main_#t~nondet7_216|} OutVars{~SIZE~0=v_~SIZE~0_65, main_~i~0=v_main_~i~0_223, main_#t~nondet7=|v_main_#t~nondet7_216|} AuxVars[] AssignedVars[] [2021-05-03 00:06:01,396 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:01,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:01,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:01,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:01,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:01,478 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:01,528 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_218| 0) (< v_main_~i~0_225 v_~SIZE~0_66)) InVars {~SIZE~0=v_~SIZE~0_66, main_~i~0=v_main_~i~0_225, main_#t~nondet7=|v_main_#t~nondet7_218|} OutVars{~SIZE~0=v_~SIZE~0_66, main_~i~0=v_main_~i~0_225, main_#t~nondet7=|v_main_#t~nondet7_218|} AuxVars[] AssignedVars[] [2021-05-03 00:06:01,529 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:01,546 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:01,547 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:01,552 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:01,559 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:01,585 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:01,616 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:01,617 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:01,617 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:01,618 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:01,841 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 00:06:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:02,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:02,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:02,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:02,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821205529] [2021-05-03 00:06:02,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [821205529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:02,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:02,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:06:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331605344] [2021-05-03 00:06:02,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:06:02,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:06:02,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:06:02,351 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:03,114 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-05-03 00:06:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:06:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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) Word has length 22 [2021-05-03 00:06:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:03,115 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:06:03,115 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:06:03,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1098.1ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:06:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:06:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-05-03 00:06:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 32 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 00:06:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-03 00:06:03,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 22 [2021-05-03 00:06:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:03,125 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-03 00:06:03,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-03 00:06:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:06:03,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:03,125 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:03,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:06:03,125 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:03,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1976642348, now seen corresponding path program 16 times [2021-05-03 00:06:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:03,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064294937] [2021-05-03 00:06:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:03,135 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_238 v_~SIZE~0_69) (<= 0 (+ |v_main_#t~nondet7_231| 2147483648)) (<= |v_main_#t~nondet7_231| 2147483647) (not (= |v_main_#t~nondet7_231| 0))) InVars {~SIZE~0=v_~SIZE~0_69, main_~i~0=v_main_~i~0_238, main_#t~nondet7=|v_main_#t~nondet7_231|} OutVars{~SIZE~0=v_~SIZE~0_69, main_~i~0=v_main_~i~0_238, main_#t~nondet7=|v_main_#t~nondet7_231|} AuxVars[] AssignedVars[] [2021-05-03 00:06:03,137 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:03,138 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:03,138 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:03,145 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:03,153 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:03,237 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:03,298 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_233| 0) (< v_main_~i~0_240 v_~SIZE~0_70)) InVars {~SIZE~0=v_~SIZE~0_70, main_~i~0=v_main_~i~0_240, main_#t~nondet7=|v_main_#t~nondet7_233|} OutVars{~SIZE~0=v_~SIZE~0_70, main_~i~0=v_main_~i~0_240, main_#t~nondet7=|v_main_#t~nondet7_233|} AuxVars[] AssignedVars[] [2021-05-03 00:06:03,301 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:03,302 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:03,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:03,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:03,322 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:03,367 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:03,408 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:03,409 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:03,409 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:03,410 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:03,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:03,604 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 00:06:03,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:06,024 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-05-03 00:06:06,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:06,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:06,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:06,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064294937] [2021-05-03 00:06:06,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2064294937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:06,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:06,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:06:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161515497] [2021-05-03 00:06:06,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:06:06,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:06:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:06:06,497 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:06,707 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 00:06:06,844 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:06:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:07,442 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-03 00:06:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:06:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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) Word has length 22 [2021-05-03 00:06:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:07,445 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:06:07,445 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:06:07,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1265.3ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:06:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:06:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-05-03 00:06:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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 00:06:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-05-03 00:06:07,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 22 [2021-05-03 00:06:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:07,455 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-05-03 00:06:07,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-05-03 00:06:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:06:07,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:07,455 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:07,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:06:07,456 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 696778670, now seen corresponding path program 17 times [2021-05-03 00:06:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:07,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477309671] [2021-05-03 00:06:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:07,465 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_246| 2147483648)) (< v_main_~i~0_253 v_~SIZE~0_73) (not (= |v_main_#t~nondet7_246| 0)) (<= |v_main_#t~nondet7_246| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_73, main_~i~0=v_main_~i~0_253, main_#t~nondet7=|v_main_#t~nondet7_246|} OutVars{~SIZE~0=v_~SIZE~0_73, main_~i~0=v_main_~i~0_253, main_#t~nondet7=|v_main_#t~nondet7_246|} AuxVars[] AssignedVars[] [2021-05-03 00:06:07,467 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:07,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:07,469 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:07,476 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:07,484 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:07,545 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:07,599 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_248| 0) (< v_main_~i~0_255 v_~SIZE~0_74)) InVars {~SIZE~0=v_~SIZE~0_74, main_~i~0=v_main_~i~0_255, main_#t~nondet7=|v_main_#t~nondet7_248|} OutVars{~SIZE~0=v_~SIZE~0_74, main_~i~0=v_main_~i~0_255, main_#t~nondet7=|v_main_#t~nondet7_248|} AuxVars[] AssignedVars[] [2021-05-03 00:06:07,601 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:07,622 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:07,623 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:07,629 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:07,638 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:07,662 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:07,699 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:07,699 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:07,700 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:07,701 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:07,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:07,897 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 00:06:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:12,035 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-05-03 00:06:14,143 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 00:06:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:18,292 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-03 00:06:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:18,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:18,961 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477309671] [2021-05-03 00:06:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477309671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:06:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558535497] [2021-05-03 00:06:18,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:06:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:06:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:06:18,963 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:21,151 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 00:06:23,260 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-03 00:06:24,511 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 00:06:24,689 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-05-03 00:06:24,908 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-03 00:06:29,284 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 135 DAG size of output: 103 [2021-05-03 00:06:31,449 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-05-03 00:06:31,669 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-05-03 00:06:35,962 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 140 DAG size of output: 108 [2021-05-03 00:06:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:36,322 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2021-05-03 00:06:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:06:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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) Word has length 22 [2021-05-03 00:06:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:36,323 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:06:36,323 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:06:36,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 21664.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:06:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:06:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:06:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 30 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 00:06:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-05-03 00:06:36,333 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 22 [2021-05-03 00:06:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:36,333 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-05-03 00:06:36,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 16 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 00:06:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-05-03 00:06:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:06:36,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:36,334 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:36,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:06:36,334 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1800597903, now seen corresponding path program 18 times [2021-05-03 00:06:36,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:36,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129643084] [2021-05-03 00:06:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:36,350 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_261| 0)) (< v_main_~i~0_268 v_~SIZE~0_77) (<= 0 (+ |v_main_#t~nondet7_261| 2147483648)) (<= |v_main_#t~nondet7_261| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_77, main_~i~0=v_main_~i~0_268, main_#t~nondet7=|v_main_#t~nondet7_261|} OutVars{~SIZE~0=v_~SIZE~0_77, main_~i~0=v_main_~i~0_268, main_#t~nondet7=|v_main_#t~nondet7_261|} AuxVars[] AssignedVars[] [2021-05-03 00:06:36,353 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:36,354 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:36,354 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:36,362 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:36,370 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:36,433 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:36,487 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_270 v_~SIZE~0_78) (= |v_main_#t~nondet7_263| 0)) InVars {~SIZE~0=v_~SIZE~0_78, main_~i~0=v_main_~i~0_270, main_#t~nondet7=|v_main_#t~nondet7_263|} OutVars{~SIZE~0=v_~SIZE~0_78, main_~i~0=v_main_~i~0_270, main_#t~nondet7=|v_main_#t~nondet7_263|} AuxVars[] AssignedVars[] [2021-05-03 00:06:36,488 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:36,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:36,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:36,495 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:36,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:36,540 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:36,579 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:36,579 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:36,588 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:36,593 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:36,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:36,853 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 00:06:36,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:36,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:36,993 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-05-03 00:06:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:37,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:37,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:37,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:37,614 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:37,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129643084] [2021-05-03 00:06:37,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129643084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:37,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:37,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:06:37,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872089044] [2021-05-03 00:06:37,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:06:37,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:37,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:06:37,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:06:37,615 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:38,611 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-03 00:06:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:06:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:06:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:38,622 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:06:38,622 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:06:38,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1472.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:06:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:06:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-05-03 00:06:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 00:06:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-03 00:06:38,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2021-05-03 00:06:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:38,632 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-03 00:06:38,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-03 00:06:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:06:38,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:38,632 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:38,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:06:38,633 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:38,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1821604111, now seen corresponding path program 19 times [2021-05-03 00:06:38,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:38,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943085164] [2021-05-03 00:06:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:38,645 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_284 v_~SIZE~0_81) (not (= |v_main_#t~nondet7_277| 0)) (<= |v_main_#t~nondet7_277| 2147483647) (<= 0 (+ |v_main_#t~nondet7_277| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_81, main_~i~0=v_main_~i~0_284, main_#t~nondet7=|v_main_#t~nondet7_277|} OutVars{~SIZE~0=v_~SIZE~0_81, main_~i~0=v_main_~i~0_284, main_#t~nondet7=|v_main_#t~nondet7_277|} AuxVars[] AssignedVars[] [2021-05-03 00:06:38,646 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:38,648 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:38,648 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:38,655 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:38,663 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:38,727 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:38,777 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_279| 0) (< v_main_~i~0_286 v_~SIZE~0_82)) InVars {~SIZE~0=v_~SIZE~0_82, main_~i~0=v_main_~i~0_286, main_#t~nondet7=|v_main_#t~nondet7_279|} OutVars{~SIZE~0=v_~SIZE~0_82, main_~i~0=v_main_~i~0_286, main_#t~nondet7=|v_main_#t~nondet7_279|} AuxVars[] AssignedVars[] [2021-05-03 00:06:38,780 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:38,797 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:38,798 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:38,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:38,812 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:38,831 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:38,866 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:38,866 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:38,868 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:38,869 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:39,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:39,175 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 00:06:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,282 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-05-03 00:06:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:39,845 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:39,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943085164] [2021-05-03 00:06:39,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [943085164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:39,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:39,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:06:39,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199479968] [2021-05-03 00:06:39,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:06:39,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:06:39,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:06:39,846 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:06:40,863 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-05-03 00:06:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:06:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:06:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:06:40,864 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:06:40,864 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:06:40,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1478.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:06:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:06:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-03 00:06:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 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 00:06:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-05-03 00:06:40,875 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 24 [2021-05-03 00:06:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:06:40,875 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-05-03 00:06:40,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-05-03 00:06:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:06:40,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:06:40,876 INFO L523 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:06:40,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:06:40,876 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:06:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:06:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash -698355823, now seen corresponding path program 20 times [2021-05-03 00:06:40,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:06:40,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691698421] [2021-05-03 00:06:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:06:40,887 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_293| 0)) (<= |v_main_#t~nondet7_293| 2147483647) (<= 0 (+ |v_main_#t~nondet7_293| 2147483648)) (< v_main_~i~0_300 v_~SIZE~0_85)) InVars {~SIZE~0=v_~SIZE~0_85, main_~i~0=v_main_~i~0_300, main_#t~nondet7=|v_main_#t~nondet7_293|} OutVars{~SIZE~0=v_~SIZE~0_85, main_~i~0=v_main_~i~0_300, main_#t~nondet7=|v_main_#t~nondet7_293|} AuxVars[] AssignedVars[] [2021-05-03 00:06:40,889 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:06:40,920 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:40,921 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:40,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:06:40,944 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:06:40,979 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:06:41,034 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_302 v_~SIZE~0_86) (= |v_main_#t~nondet7_295| 0)) InVars {~SIZE~0=v_~SIZE~0_86, main_~i~0=v_main_~i~0_302, main_#t~nondet7=|v_main_#t~nondet7_295|} OutVars{~SIZE~0=v_~SIZE~0_86, main_~i~0=v_main_~i~0_302, main_#t~nondet7=|v_main_#t~nondet7_295|} AuxVars[] AssignedVars[] [2021-05-03 00:06:41,035 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:06:41,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:41,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:06:41,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:06:41,052 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:06:41,108 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:06:41,146 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:41,146 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:41,147 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:06:41,148 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:06:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:41,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:06:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:06:41,322 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 00:06:41,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:45,479 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-05-03 00:06:47,591 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 00:06:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:51,747 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-05-03 00:06:51,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:51,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:52,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:06:52,236 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:06:52,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691698421] [2021-05-03 00:06:52,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691698421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:06:52,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:06:52,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:06:52,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393307172] [2021-05-03 00:06:52,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:06:52,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:06:52,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:06:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:06:52,237 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:06:56,591 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2021-05-03 00:07:00,896 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2021-05-03 00:07:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:07:01,783 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-05-03 00:07:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:07:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:07:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:07:01,785 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:07:01,785 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:07:01,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 15966.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:07:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:07:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-03 00:07:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 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 00:07:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-05-03 00:07:01,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 24 [2021-05-03 00:07:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:07:01,796 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-05-03 00:07:01,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:07:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-05-03 00:07:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:07:01,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:07:01,796 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:07:01,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:07:01,796 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:07:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:07:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash -374556013, now seen corresponding path program 21 times [2021-05-03 00:07:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:07:01,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079740737] [2021-05-03 00:07:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:07:01,810 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_316 v_~SIZE~0_89) (<= 0 (+ |v_main_#t~nondet7_309| 2147483648)) (<= |v_main_#t~nondet7_309| 2147483647) (not (= |v_main_#t~nondet7_309| 0))) InVars {~SIZE~0=v_~SIZE~0_89, main_~i~0=v_main_~i~0_316, main_#t~nondet7=|v_main_#t~nondet7_309|} OutVars{~SIZE~0=v_~SIZE~0_89, main_~i~0=v_main_~i~0_316, main_#t~nondet7=|v_main_#t~nondet7_309|} AuxVars[] AssignedVars[] [2021-05-03 00:07:01,813 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:07:01,815 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,815 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:07:01,834 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:07:01,900 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:07:01,957 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_311| 0) (< v_main_~i~0_318 v_~SIZE~0_90)) InVars {~SIZE~0=v_~SIZE~0_90, main_~i~0=v_main_~i~0_318, main_#t~nondet7=|v_main_#t~nondet7_311|} OutVars{~SIZE~0=v_~SIZE~0_90, main_~i~0=v_main_~i~0_318, main_#t~nondet7=|v_main_#t~nondet7_311|} AuxVars[] AssignedVars[] [2021-05-03 00:07:01,959 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:07:01,959 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,960 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:07:01,967 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:07:01,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:07:02,021 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:07:02,058 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:02,058 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:07:02,073 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:07:02,074 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:07:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:02,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:07:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:07:02,308 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 00:07:02,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:06,466 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:07:08,569 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 00:07:08,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:12,715 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-05-03 00:07:12,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:14,827 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:07:14,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:16,955 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:07:16,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:19,101 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 00:07:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:21,228 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 00:07:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:25,479 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:07:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:31,653 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:07:31,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:36,593 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-05-03 00:07:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:46,885 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:07:46,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:51,142 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:07:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:57,899 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:07:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:07:57,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:08:04,166 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 00:08:04,168 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:08:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079740737] [2021-05-03 00:08:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079740737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:08:04,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:08:04,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:08:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92277011] [2021-05-03 00:08:04,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:08:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:08:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:08:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=417, Unknown=10, NotChecked=0, Total=506 [2021-05-03 00:08:04,169 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:08:06,514 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 00:08:07,719 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-05-03 00:08:09,967 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 00:08:12,503 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 00:08:14,748 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 00:08:17,450 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 00:08:25,682 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 00:08:38,033 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 00:08:40,282 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 00:09:06,285 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 00:09:16,749 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 00:09:31,077 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 00:09:33,365 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 00:09:49,999 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-05-03 00:09:54,458 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-05-03 00:09:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:09:54,777 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-03 00:09:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:09:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-03 00:09:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:09:54,781 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:09:54,781 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:09:54,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 134727.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1388, Unknown=30, NotChecked=0, Total=1640 [2021-05-03 00:09:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:09:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-05-03 00:09:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 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 00:09:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-05-03 00:09:54,795 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 24 [2021-05-03 00:09:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:09:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-05-03 00:09:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:09:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-05-03 00:09:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:09:54,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:09:54,796 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:09:54,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:09:54,796 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:09:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:09:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 125610802, now seen corresponding path program 22 times [2021-05-03 00:09:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:09:54,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559759008] [2021-05-03 00:09:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:09:54,812 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_325| 0)) (< v_main_~i~0_332 v_~SIZE~0_93) (<= |v_main_#t~nondet7_325| 2147483647) (<= 0 (+ |v_main_#t~nondet7_325| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_93, main_~i~0=v_main_~i~0_332, main_#t~nondet7=|v_main_#t~nondet7_325|} OutVars{~SIZE~0=v_~SIZE~0_93, main_~i~0=v_main_~i~0_332, main_#t~nondet7=|v_main_#t~nondet7_325|} AuxVars[] AssignedVars[] [2021-05-03 00:09:54,814 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:09:54,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:54,865 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:54,878 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:09:54,894 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:09:54,967 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:09:55,086 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:09:55,092 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_327| 0) (< v_main_~i~0_334 v_~SIZE~0_94)) InVars {~SIZE~0=v_~SIZE~0_94, main_~i~0=v_main_~i~0_334, main_#t~nondet7=|v_main_#t~nondet7_327|} OutVars{~SIZE~0=v_~SIZE~0_94, main_~i~0=v_main_~i~0_334, main_#t~nondet7=|v_main_#t~nondet7_327|} AuxVars[] AssignedVars[] [2021-05-03 00:09:55,094 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:09:55,096 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:55,097 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:09:55,109 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:09:55,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:09:55,200 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:09:55,290 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:55,291 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:09:55,292 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:09:55,294 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:09:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:55,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:09:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:09:55,725 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 00:09:55,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:55,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:55,937 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 30 [2021-05-03 00:09:56,263 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:09:56,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:56,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:56,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:09:57,450 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:09:57,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559759008] [2021-05-03 00:09:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559759008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:09:57,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:09:57,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:09:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809388563] [2021-05-03 00:09:57,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:09:57,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:09:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:09:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:09:57,452 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:09:57,966 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 00:09:58,291 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:10:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:00,269 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-03 00:10:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:00,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:00,273 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:10:00,273 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:10:00,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3769.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:10:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-03 00:10:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 00:10:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-05-03 00:10:00,288 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 26 [2021-05-03 00:10:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:00,289 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-05-03 00:10:00,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-05-03 00:10:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:00,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:00,289 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:00,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:10:00,289 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash 146617010, now seen corresponding path program 23 times [2021-05-03 00:10:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:00,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079399582] [2021-05-03 00:10:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:00,304 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_349 v_~SIZE~0_97) (<= 0 (+ |v_main_#t~nondet7_342| 2147483648)) (<= |v_main_#t~nondet7_342| 2147483647) (not (= |v_main_#t~nondet7_342| 0))) InVars {~SIZE~0=v_~SIZE~0_97, main_~i~0=v_main_~i~0_349, main_#t~nondet7=|v_main_#t~nondet7_342|} OutVars{~SIZE~0=v_~SIZE~0_97, main_~i~0=v_main_~i~0_349, main_#t~nondet7=|v_main_#t~nondet7_342|} AuxVars[] AssignedVars[] [2021-05-03 00:10:00,306 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:00,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:00,357 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:00,369 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:00,384 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:00,457 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:00,576 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:00,583 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_344| 0) (< v_main_~i~0_351 v_~SIZE~0_98)) InVars {~SIZE~0=v_~SIZE~0_98, main_~i~0=v_main_~i~0_351, main_#t~nondet7=|v_main_#t~nondet7_344|} OutVars{~SIZE~0=v_~SIZE~0_98, main_~i~0=v_main_~i~0_351, main_#t~nondet7=|v_main_#t~nondet7_344|} AuxVars[] AssignedVars[] [2021-05-03 00:10:00,585 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:00,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:00,587 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:00,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:00,614 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:00,679 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:00,767 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:00,768 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:00,770 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:00,771 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:01,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:01,097 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 00:10:01,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:01,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:05,398 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:10:07,830 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 00:10:07,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:08,952 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 67 DAG size of output: 22 [2021-05-03 00:10:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:09,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:10,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:10,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:10,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079399582] [2021-05-03 00:10:10,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079399582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:10,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:10,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:10,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209009577] [2021-05-03 00:10:10,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:10:10,199 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:14,911 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2021-05-03 00:10:15,511 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:10:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:17,780 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-03 00:10:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:17,782 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:10:17,782 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:10:17,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 11478.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:10:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:10:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-03 00:10:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:10:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-05-03 00:10:17,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-05-03 00:10:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-05-03 00:10:17,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-05-03 00:10:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:17,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:17,801 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:17,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:10:17,801 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1921624372, now seen corresponding path program 24 times [2021-05-03 00:10:17,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:17,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861225877] [2021-05-03 00:10:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:17,822 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_359| 0)) (< v_main_~i~0_366 v_~SIZE~0_101) (<= 0 (+ |v_main_#t~nondet7_359| 2147483648)) (<= |v_main_#t~nondet7_359| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_101, main_~i~0=v_main_~i~0_366, main_#t~nondet7=|v_main_#t~nondet7_359|} OutVars{~SIZE~0=v_~SIZE~0_101, main_~i~0=v_main_~i~0_366, main_#t~nondet7=|v_main_#t~nondet7_359|} AuxVars[] AssignedVars[] [2021-05-03 00:10:17,829 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:17,831 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:17,832 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:17,845 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:17,862 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:18,004 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:18,150 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:18,163 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_368 v_~SIZE~0_102) (= |v_main_#t~nondet7_361| 0)) InVars {~SIZE~0=v_~SIZE~0_102, main_~i~0=v_main_~i~0_368, main_#t~nondet7=|v_main_#t~nondet7_361|} OutVars{~SIZE~0=v_~SIZE~0_102, main_~i~0=v_main_~i~0_368, main_#t~nondet7=|v_main_#t~nondet7_361|} AuxVars[] AssignedVars[] [2021-05-03 00:10:18,165 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:18,167 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:18,168 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:18,180 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:18,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:18,283 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:18,386 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:18,389 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:18,390 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:18,392 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:18,394 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:18,796 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:10:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:10:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:21,886 WARN L205 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2021-05-03 00:10:22,210 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:22,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:22,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:22,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:23,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:23,396 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:23,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861225877] [2021-05-03 00:10:23,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861225877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:23,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:23,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:23,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56157233] [2021-05-03 00:10:23,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:23,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:10:23,397 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:23,791 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:10:24,022 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:10:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:26,140 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-03 00:10:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:26,143 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:10:26,143 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:10:26,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 3705.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:10:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:10:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-03 00:10:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 00:10:26,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-05-03 00:10:26,161 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 26 [2021-05-03 00:10:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:26,161 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-05-03 00:10:26,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-05-03 00:10:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:26,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:26,161 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:26,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:10:26,162 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1141253582, now seen corresponding path program 25 times [2021-05-03 00:10:26,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:26,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471714803] [2021-05-03 00:10:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:26,179 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_376| 0)) (<= |v_main_#t~nondet7_376| 2147483647) (< v_main_~i~0_383 v_~SIZE~0_105) (<= 0 (+ |v_main_#t~nondet7_376| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_105, main_~i~0=v_main_~i~0_383, main_#t~nondet7=|v_main_#t~nondet7_376|} OutVars{~SIZE~0=v_~SIZE~0_105, main_~i~0=v_main_~i~0_383, main_#t~nondet7=|v_main_#t~nondet7_376|} AuxVars[] AssignedVars[] [2021-05-03 00:10:26,182 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:26,183 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:26,184 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:26,198 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:26,214 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:26,345 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:26,478 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:26,485 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_385 v_~SIZE~0_106) (= |v_main_#t~nondet7_378| 0)) InVars {~SIZE~0=v_~SIZE~0_106, main_~i~0=v_main_~i~0_385, main_#t~nondet7=|v_main_#t~nondet7_378|} OutVars{~SIZE~0=v_~SIZE~0_106, main_~i~0=v_main_~i~0_385, main_#t~nondet7=|v_main_#t~nondet7_378|} AuxVars[] AssignedVars[] [2021-05-03 00:10:26,487 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:26,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:26,490 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:26,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:26,518 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:26,604 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:26,703 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:26,703 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:26,705 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:26,707 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:27,182 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:10:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:10:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:27,580 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-05-03 00:10:27,917 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:27,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:28,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:28,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:29,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:29,154 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:29,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471714803] [2021-05-03 00:10:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [471714803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:29,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:29,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:29,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704362373] [2021-05-03 00:10:29,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:29,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:10:29,156 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:29,535 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:10:29,751 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:10:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:31,822 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-05-03 00:10:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:31,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:31,824 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:10:31,825 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:10:31,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3809.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:10:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-03 00:10:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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 00:10:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-05-03 00:10:31,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 26 [2021-05-03 00:10:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:31,844 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-05-03 00:10:31,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-05-03 00:10:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:31,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:31,845 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:31,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:10:31,845 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 633753780, now seen corresponding path program 26 times [2021-05-03 00:10:31,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:31,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794261704] [2021-05-03 00:10:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:31,861 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_393| 2147483647) (< v_main_~i~0_400 v_~SIZE~0_109) (<= 0 (+ |v_main_#t~nondet7_393| 2147483648)) (not (= |v_main_#t~nondet7_393| 0))) InVars {~SIZE~0=v_~SIZE~0_109, main_~i~0=v_main_~i~0_400, main_#t~nondet7=|v_main_#t~nondet7_393|} OutVars{~SIZE~0=v_~SIZE~0_109, main_~i~0=v_main_~i~0_400, main_#t~nondet7=|v_main_#t~nondet7_393|} AuxVars[] AssignedVars[] [2021-05-03 00:10:31,889 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:31,941 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:31,942 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:31,954 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:31,971 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:32,049 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:32,203 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:32,211 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_402 v_~SIZE~0_110) (= |v_main_#t~nondet7_395| 0)) InVars {~SIZE~0=v_~SIZE~0_110, main_~i~0=v_main_~i~0_402, main_#t~nondet7=|v_main_#t~nondet7_395|} OutVars{~SIZE~0=v_~SIZE~0_110, main_~i~0=v_main_~i~0_402, main_#t~nondet7=|v_main_#t~nondet7_395|} AuxVars[] AssignedVars[] [2021-05-03 00:10:32,213 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:32,215 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:32,216 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:32,230 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:32,249 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:32,330 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:32,432 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:32,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:32,435 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:32,437 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:32,439 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:32,702 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 00:10:33,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:33,009 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 00:10:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:33,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:33,277 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2021-05-03 00:10:33,647 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:33,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:34,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:34,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:34,991 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:34,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794261704] [2021-05-03 00:10:34,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794261704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:34,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:34,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635977900] [2021-05-03 00:10:34,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:10:34,993 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:35,585 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 00:10:35,929 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:10:36,460 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 00:10:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:38,380 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-05-03 00:10:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:38,383 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:10:38,383 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:10:38,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4430.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:10:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-05-03 00:10:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:10:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-05-03 00:10:38,401 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-05-03 00:10:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:38,402 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-05-03 00:10:38,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-05-03 00:10:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:38,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:38,402 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:38,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:10:38,402 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -461195212, now seen corresponding path program 27 times [2021-05-03 00:10:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:38,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190988955] [2021-05-03 00:10:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:38,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_417 v_~SIZE~0_113) (not (= |v_main_#t~nondet7_410| 0)) (<= 0 (+ |v_main_#t~nondet7_410| 2147483648)) (<= |v_main_#t~nondet7_410| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_113, main_~i~0=v_main_~i~0_417, main_#t~nondet7=|v_main_#t~nondet7_410|} OutVars{~SIZE~0=v_~SIZE~0_113, main_~i~0=v_main_~i~0_417, main_#t~nondet7=|v_main_#t~nondet7_410|} AuxVars[] AssignedVars[] [2021-05-03 00:10:38,421 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:38,483 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:38,484 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:38,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:38,516 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:38,596 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:38,724 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:38,731 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_419 v_~SIZE~0_114) (= |v_main_#t~nondet7_412| 0)) InVars {~SIZE~0=v_~SIZE~0_114, main_~i~0=v_main_~i~0_419, main_#t~nondet7=|v_main_#t~nondet7_412|} OutVars{~SIZE~0=v_~SIZE~0_114, main_~i~0=v_main_~i~0_419, main_#t~nondet7=|v_main_#t~nondet7_412|} AuxVars[] AssignedVars[] [2021-05-03 00:10:38,733 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:38,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:38,740 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:38,755 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:38,775 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:38,882 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:38,995 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:38,998 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:38,999 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:39,001 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:39,004 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:39,258 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 00:10:39,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:39,551 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 00:10:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:39,803 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 30 [2021-05-03 00:10:40,153 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:40,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:41,426 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190988955] [2021-05-03 00:10:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [190988955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:41,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:41,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:41,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215653426] [2021-05-03 00:10:41,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:41,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:41,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:41,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:10:41,427 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:41,963 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 00:10:42,338 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-03 00:10:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:44,582 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-05-03 00:10:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:44,585 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:10:44,585 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:10:44,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4186.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:10:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-03 00:10:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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 00:10:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-05-03 00:10:44,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 26 [2021-05-03 00:10:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:44,604 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-05-03 00:10:44,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-05-03 00:10:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:44,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:44,604 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:44,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:10:44,604 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1313812150, now seen corresponding path program 28 times [2021-05-03 00:10:44,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:44,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175894127] [2021-05-03 00:10:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:44,621 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= |v_main_#t~nondet7_427| 2147483647) (not (= |v_main_#t~nondet7_427| 0)) (<= 0 (+ |v_main_#t~nondet7_427| 2147483648)) (< v_main_~i~0_434 v_~SIZE~0_117)) InVars {~SIZE~0=v_~SIZE~0_117, main_~i~0=v_main_~i~0_434, main_#t~nondet7=|v_main_#t~nondet7_427|} OutVars{~SIZE~0=v_~SIZE~0_117, main_~i~0=v_main_~i~0_434, main_#t~nondet7=|v_main_#t~nondet7_427|} AuxVars[] AssignedVars[] [2021-05-03 00:10:44,624 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:44,693 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:44,694 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:44,709 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:44,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:44,811 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:44,954 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:44,961 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_436 v_~SIZE~0_118) (= |v_main_#t~nondet7_429| 0)) InVars {~SIZE~0=v_~SIZE~0_118, main_~i~0=v_main_~i~0_436, main_#t~nondet7=|v_main_#t~nondet7_429|} OutVars{~SIZE~0=v_~SIZE~0_118, main_~i~0=v_main_~i~0_436, main_#t~nondet7=|v_main_#t~nondet7_429|} AuxVars[] AssignedVars[] [2021-05-03 00:10:44,963 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:45,004 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:45,006 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:45,021 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:45,040 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:45,090 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:45,192 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:45,195 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:45,195 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:45,197 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:45,199 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:45,652 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 9 [2021-05-03 00:10:45,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:45,802 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 00:10:45,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:46,024 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2021-05-03 00:10:46,365 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:46,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:47,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:47,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:47,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175894127] [2021-05-03 00:10:47,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1175894127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:47,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:47,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:47,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294802120] [2021-05-03 00:10:47,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:10:47,727 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:48,212 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:10:48,486 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:10:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:50,949 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-03 00:10:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:50,952 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:10:50,952 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:10:50,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 4239.9ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:10:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-05-03 00:10:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:10:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-05-03 00:10:50,969 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-05-03 00:10:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:50,969 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-05-03 00:10:50,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-05-03 00:10:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:50,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:50,970 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:50,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:10:50,970 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 239869366, now seen corresponding path program 29 times [2021-05-03 00:10:50,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:50,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410509915] [2021-05-03 00:10:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:50,985 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_444| 0)) (<= |v_main_#t~nondet7_444| 2147483647) (<= 0 (+ |v_main_#t~nondet7_444| 2147483648)) (< v_main_~i~0_451 v_~SIZE~0_121)) InVars {~SIZE~0=v_~SIZE~0_121, main_~i~0=v_main_~i~0_451, main_#t~nondet7=|v_main_#t~nondet7_444|} OutVars{~SIZE~0=v_~SIZE~0_121, main_~i~0=v_main_~i~0_451, main_#t~nondet7=|v_main_#t~nondet7_444|} AuxVars[] AssignedVars[] [2021-05-03 00:10:50,987 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:51,047 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:51,049 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:51,064 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:51,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:51,176 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:51,313 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:51,321 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_446| 0) (< v_main_~i~0_453 v_~SIZE~0_122)) InVars {~SIZE~0=v_~SIZE~0_122, main_~i~0=v_main_~i~0_453, main_#t~nondet7=|v_main_#t~nondet7_446|} OutVars{~SIZE~0=v_~SIZE~0_122, main_~i~0=v_main_~i~0_453, main_#t~nondet7=|v_main_#t~nondet7_446|} AuxVars[] AssignedVars[] [2021-05-03 00:10:51,328 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:51,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:51,331 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:51,345 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:51,363 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:51,439 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:51,547 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:51,547 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:51,549 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:51,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:52,105 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:10:52,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:52,307 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 00:10:52,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:52,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:52,623 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2021-05-03 00:10:52,977 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:10:52,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:53,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:54,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:54,345 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:10:54,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410509915] [2021-05-03 00:10:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410509915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:10:54,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:10:54,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:10:54,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601330233] [2021-05-03 00:10:54,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:10:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:10:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:10:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:10:54,346 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:54,794 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:10:55,060 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:10:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:10:57,634 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-05-03 00:10:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:10:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:10:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:10:57,639 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:10:57,639 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:10:57,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 4416.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:10:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:10:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-05-03 00:10:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:10:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-05-03 00:10:57,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-05-03 00:10:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:10:57,660 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-05-03 00:10:57,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:10:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-05-03 00:10:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:10:57,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:10:57,663 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:10:57,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:10:57,663 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:10:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:10:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1741058890, now seen corresponding path program 30 times [2021-05-03 00:10:57,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:10:57,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593805160] [2021-05-03 00:10:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:10:57,689 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_468 v_~SIZE~0_125) (not (= |v_main_#t~nondet7_461| 0)) (<= |v_main_#t~nondet7_461| 2147483647) (<= 0 (+ |v_main_#t~nondet7_461| 2147483648))) InVars {~SIZE~0=v_~SIZE~0_125, main_~i~0=v_main_~i~0_468, main_#t~nondet7=|v_main_#t~nondet7_461|} OutVars{~SIZE~0=v_~SIZE~0_125, main_~i~0=v_main_~i~0_468, main_#t~nondet7=|v_main_#t~nondet7_461|} AuxVars[] AssignedVars[] [2021-05-03 00:10:57,695 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:10:57,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:57,764 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:57,786 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:10:57,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:10:57,904 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:10:58,054 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:10:58,091 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_470 v_~SIZE~0_126) (= |v_main_#t~nondet7_463| 0)) InVars {~SIZE~0=v_~SIZE~0_126, main_~i~0=v_main_~i~0_470, main_#t~nondet7=|v_main_#t~nondet7_463|} OutVars{~SIZE~0=v_~SIZE~0_126, main_~i~0=v_main_~i~0_470, main_#t~nondet7=|v_main_#t~nondet7_463|} AuxVars[] AssignedVars[] [2021-05-03 00:10:58,093 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:10:58,153 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:58,154 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:10:58,169 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:10:58,205 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:10:58,273 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:10:58,392 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:10:58,396 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:58,396 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:58,398 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:10:58,401 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:10:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:58,798 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:10:58,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:10:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:10:58,954 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 00:10:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:10:58,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:03,302 WARN L205 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-05-03 00:11:05,585 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 00:11:05,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:09,936 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-03 00:11:09,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:10,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:11,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:11:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593805160] [2021-05-03 00:11:11,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593805160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:11:11,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:11:11,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:11:11,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888778553] [2021-05-03 00:11:11,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:11:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:11:11,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:11:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:11:11,304 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:12,005 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2021-05-03 00:11:14,300 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-03 00:11:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:16,773 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-03 00:11:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:11:16,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:11:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:16,776 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:11:16,776 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:11:16,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 12735.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:11:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:11:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2021-05-03 00:11:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 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 00:11:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-05-03 00:11:16,795 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2021-05-03 00:11:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:16,795 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-05-03 00:11:16,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-05-03 00:11:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:11:16,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:11:16,795 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:11:16,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:11:16,795 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:11:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:11:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1451770678, now seen corresponding path program 31 times [2021-05-03 00:11:16,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:11:16,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836280700] [2021-05-03 00:11:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:11:16,818 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_478| 2147483648)) (<= |v_main_#t~nondet7_478| 2147483647) (< v_main_~i~0_485 v_~SIZE~0_129) (not (= |v_main_#t~nondet7_478| 0))) InVars {~SIZE~0=v_~SIZE~0_129, main_~i~0=v_main_~i~0_485, main_#t~nondet7=|v_main_#t~nondet7_478|} OutVars{~SIZE~0=v_~SIZE~0_129, main_~i~0=v_main_~i~0_485, main_#t~nondet7=|v_main_#t~nondet7_478|} AuxVars[] AssignedVars[] [2021-05-03 00:11:16,820 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:11:16,822 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:16,823 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:16,838 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:11:16,857 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:11:17,010 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:11:17,159 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:11:17,171 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet7_480| 0) (< v_main_~i~0_487 v_~SIZE~0_130)) InVars {~SIZE~0=v_~SIZE~0_130, main_~i~0=v_main_~i~0_487, main_#t~nondet7=|v_main_#t~nondet7_480|} OutVars{~SIZE~0=v_~SIZE~0_130, main_~i~0=v_main_~i~0_487, main_#t~nondet7=|v_main_#t~nondet7_480|} AuxVars[] AssignedVars[] [2021-05-03 00:11:17,173 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:11:17,216 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:17,217 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:17,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:11:17,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:11:17,304 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:11:17,404 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:17,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:11:17,410 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:11:17,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:17,763 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:11:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:11:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:17,918 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 00:11:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:17,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:22,223 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 00:11:23,997 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2021-05-03 00:11:24,210 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 00:11:25,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:25,314 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-03 00:11:25,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:25,755 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-05-03 00:11:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:26,690 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 00:11:26,693 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:11:26,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836280700] [2021-05-03 00:11:26,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836280700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:11:26,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:11:26,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:11:26,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423856862] [2021-05-03 00:11:26,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:11:26,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:11:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:11:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:11:26,695 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:27,100 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:11:27,324 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 00:11:27,557 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 00:11:27,805 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:11:28,049 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 00:11:28,345 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:11:28,598 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:11:28,959 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:11:29,243 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:11:29,564 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:11:29,806 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:11:30,130 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:11:30,366 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:11:30,653 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 00:11:30,980 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 00:11:31,404 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 00:11:31,796 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-05-03 00:11:32,271 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-05-03 00:11:32,686 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-05-03 00:11:33,006 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-05-03 00:11:33,315 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 00:11:33,747 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-05-03 00:11:34,218 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-05-03 00:11:34,550 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 00:11:34,998 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2021-05-03 00:11:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:35,243 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2021-05-03 00:11:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:11:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:11:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:35,247 INFO L225 Difference]: With dead ends: 87 [2021-05-03 00:11:35,247 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:11:35,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 11756.0ms TimeCoverageRelationStatistics Valid=427, Invalid=2329, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:11:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:11:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-03 00:11:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 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 00:11:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-05-03 00:11:35,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 26 [2021-05-03 00:11:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:35,266 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-05-03 00:11:35,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-05-03 00:11:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:11:35,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:11:35,266 INFO L523 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:11:35,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:11:35,266 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:11:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:11:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1472776886, now seen corresponding path program 32 times [2021-05-03 00:11:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:11:35,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193190255] [2021-05-03 00:11:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:11:35,283 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= |v_main_#t~nondet7_495| 0)) (<= 0 (+ |v_main_#t~nondet7_495| 2147483648)) (< v_main_~i~0_502 v_~SIZE~0_133) (<= |v_main_#t~nondet7_495| 2147483647)) InVars {~SIZE~0=v_~SIZE~0_133, main_~i~0=v_main_~i~0_502, main_#t~nondet7=|v_main_#t~nondet7_495|} OutVars{~SIZE~0=v_~SIZE~0_133, main_~i~0=v_main_~i~0_502, main_#t~nondet7=|v_main_#t~nondet7_495|} AuxVars[] AssignedVars[] [2021-05-03 00:11:35,287 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size [2021-05-03 00:11:35,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:35,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:35,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:11:35,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:11:35,502 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 90.4 percent of original size 103 [2021-05-03 00:11:35,666 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 00:11:35,678 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_504 v_~SIZE~0_134) (= |v_main_#t~nondet7_497| 0)) InVars {~SIZE~0=v_~SIZE~0_134, main_~i~0=v_main_~i~0_504, main_#t~nondet7=|v_main_#t~nondet7_497|} OutVars{~SIZE~0=v_~SIZE~0_134, main_~i~0=v_main_~i~0_504, main_#t~nondet7=|v_main_#t~nondet7_497|} AuxVars[] AssignedVars[] [2021-05-03 00:11:35,680 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size [2021-05-03 00:11:35,682 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:35,683 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:11:35,697 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-03 00:11:35,719 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:11:35,831 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.0 percent of original size 71 [2021-05-03 00:11:35,941 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 00:11:35,945 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:35,945 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:11:35,948 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-03 00:11:35,950 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:11:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:36,500 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2021-05-03 00:11:36,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:11:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:11:36,693 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 00:11:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:36,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:37,016 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2021-05-03 00:11:37,189 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 00:11:37,456 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-05-03 00:11:38,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:38,785 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-05-03 00:11:39,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:39,620 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-03 00:11:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:11:40,185 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-03 00:11:40,188 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:11:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193190255] [2021-05-03 00:11:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [193190255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:11:40,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:11:40,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:11:40,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508080613] [2021-05-03 00:11:40,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:11:40,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:11:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:11:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:11:40,189 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:40,613 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 00:11:40,850 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 00:11:41,102 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:11:41,365 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:11:41,619 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 00:11:41,891 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 00:11:42,155 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 00:11:42,558 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 00:11:42,896 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 00:11:43,231 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 00:11:43,516 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 00:11:43,780 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:11:44,041 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:11:44,371 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 00:11:44,621 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 00:11:45,142 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-05-03 00:11:45,529 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-05-03 00:11:45,850 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-03 00:11:46,178 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2021-05-03 00:11:46,544 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-05-03 00:11:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:11:46,854 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-05-03 00:11:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:11:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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) Word has length 26 [2021-05-03 00:11:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:11:46,854 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:11:46,854 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 00:11:46,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 9178.9ms TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:11:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 00:11:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 00:11:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 00:11:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 00:11:46,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-05-03 00:11:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:11:46,856 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 00:11:46,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 20 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 00:11:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 00:11:46,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 00:11:46,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 00:11:46,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-03 00:11:47,612 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 731 [2021-05-03 00:11:48,476 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 616 [2021-05-03 00:11:53,388 WARN L205 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 694 DAG size of output: 55 [2021-05-03 00:11:57,633 WARN L205 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 595 DAG size of output: 47 [2021-05-03 00:11:58,238 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2021-05-03 00:11:58,604 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 20 [2021-05-03 00:11:58,608 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-03 00:11:58,608 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-03 00:11:58,608 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-03 00:11:58,608 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-03 00:11:58,608 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-03 00:11:58,608 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~SIZE~0 50000001) (<= 50000001 ~SIZE~0)) [2021-05-03 00:11:58,609 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: (<= 50000001 ~SIZE~0) [2021-05-03 00:11:58,609 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2021-05-03 00:11:58,609 INFO L198 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-05-03 00:11:58,609 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-05-03 00:11:58,609 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (not (<= 50000001 ~SIZE~0)) (let ((.cse0 (* 4 main_~j~0))) (and (< main_~i~0 (+ ~SIZE~0 8)) (<= 50000001 main_~i~0) (<= main_~i~0 .cse0) (< .cse0 (+ main_~i~0 1)))) (not (<= ~SIZE~0 50000001))) [2021-05-03 00:11:58,609 INFO L201 CegarLoopUtils]: At program point L32-1(line 32) the Hoare annotation is: true [2021-05-03 00:11:58,609 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point L25(lines 25 28) the Hoare annotation is: (let ((.cse1 (< main_~i~0 ~SIZE~0)) (.cse0 (<= 0 (+ |main_#t~nondet7| 2147483648))) (.cse2 (<= |main_#t~nondet7| 2147483647))) (or (and (= 0 (mod (+ main_~i~0 4) 8)) .cse0 .cse1 (< 0 (div (+ main_~i~0 (- 12)) 8)) .cse2) (not (<= 50000001 ~SIZE~0)) (and (= main_~i~0 4) .cse0 .cse2) (and .cse0 .cse1 (or (= main_~i~0 12) (= main_~i~0 8) (and (= (mod main_~i~0 8) 0) (< 0 (div (+ main_~i~0 (- 8)) 8)))) .cse2) (not (<= ~SIZE~0 50000001)) (and (= main_~i~0 0) .cse0 (= main_~j~0 (div main_~i~0 4)) .cse2))) [2021-05-03 00:11:58,609 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point L25-2(lines 23 30) the Hoare annotation is: (let ((.cse0 (= (mod main_~i~0 8) 0)) (.cse1 (< main_~i~0 (+ ~SIZE~0 8)))) (or (= main_~i~0 12) (= main_~i~0 4) (and (or (= main_~i~0 16) (and .cse0 (< 0 (div (+ main_~i~0 (- 16)) 8)))) (< main_~i~0 (+ ~SIZE~0 4))) (and .cse1 (or (= main_~i~0 20) (and (= 0 (mod (+ main_~i~0 4) 8)) (< 0 (div (+ main_~i~0 (- 20)) 8))))) (not (<= 50000001 ~SIZE~0)) (= main_~i~0 8) (and (= main_~i~0 0) (= main_~j~0 (div main_~i~0 4))) (and .cse0 .cse1 (< 0 (div (+ main_~i~0 (- 32)) 8))) (not (<= ~SIZE~0 50000001)))) [2021-05-03 00:11:58,609 INFO L194 CegarLoopUtils]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse0 (< main_~i~0 (+ ~SIZE~0 8))) (.cse1 (<= 50000001 main_~i~0))) (or (and (= (mod (+ (* main_~i~0 7) 4) (- 8)) 0) .cse0 .cse1) (and (= (mod main_~i~0 8) 0) .cse0 .cse1) (not (<= 50000001 ~SIZE~0)) (not (<= ~SIZE~0 50000001)))) [2021-05-03 00:11:58,610 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2021-05-03 00:11:58,610 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2021-05-03 00:11:58,610 INFO L194 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (or (not (<= ~SIZE~0 50000001)) (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0))) [2021-05-03 00:11:58,610 INFO L194 CegarLoopUtils]: At program point L13(lines 13 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0)) (not (= __VERIFIER_assert_~cond 0)) (not (<= ~SIZE~0 50000001))) [2021-05-03 00:11:58,610 INFO L201 CegarLoopUtils]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2021-05-03 00:11:58,610 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 12 17) the Hoare annotation is: true [2021-05-03 00:11:58,610 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (or (not (<= ~SIZE~0 50000001)) (= |__VERIFIER_assert_#in~cond| 0) (not (<= 50000001 ~SIZE~0))) [2021-05-03 00:11:58,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:11:58 BoogieIcfgContainer [2021-05-03 00:11:58,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:11:58,622 INFO L168 Benchmark]: Toolchain (without parser) took 488334.67 ms. Allocated memory was 187.7 MB in the beginning and 270.5 MB in the end (delta: 82.8 MB). Free memory was 153.8 MB in the beginning and 180.2 MB in the end (delta: -26.4 MB). Peak memory consumption was 152.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:11:58,622 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory is still 170.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:11:58,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.72 ms. Allocated memory is still 187.7 MB. Free memory was 153.6 MB in the beginning and 144.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:11:58,622 INFO L168 Benchmark]: Boogie Preprocessor took 34.68 ms. Allocated memory is still 187.7 MB. Free memory was 144.2 MB in the beginning and 172.0 MB in the end (delta: -27.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:11:58,622 INFO L168 Benchmark]: RCFGBuilder took 205.55 ms. Allocated memory is still 187.7 MB. Free memory was 172.0 MB in the beginning and 158.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:11:58,622 INFO L168 Benchmark]: TraceAbstraction took 487961.56 ms. Allocated memory was 187.7 MB in the beginning and 270.5 MB in the end (delta: 82.8 MB). Free memory was 157.5 MB in the beginning and 180.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 156.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:11:58,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory is still 170.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 119.72 ms. Allocated memory is still 187.7 MB. Free memory was 153.6 MB in the beginning and 144.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.68 ms. Allocated memory is still 187.7 MB. Free memory was 144.2 MB in the beginning and 172.0 MB in the end (delta: -27.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 205.55 ms. Allocated memory is still 187.7 MB. Free memory was 172.0 MB in the beginning and 158.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 487961.56 ms. Allocated memory was 187.7 MB in the beginning and 270.5 MB in the end (delta: 82.8 MB). Free memory was 157.5 MB in the beginning and 180.2 MB in the end (delta: -22.7 MB). Peak memory consumption was 156.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 476163.9ms, OverallIterations: 38, TraceHistogramMax: 7, EmptinessCheckTime: 26.2ms, AutomataDifference: 242804.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 11751.1ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 377 SDtfs, 1246 SDslu, 1120 SDs, 0 SdLazy, 10095 SolverSat, 625 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 51625.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1330 GetRequests, 114 SyntacticMatches, 15 SemanticMatches, 1201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8125 ImplicationChecksByTransitivity, 338757.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=31, InterpolantAutomatonStates: 652, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 424.8ms AutomataMinimizationTime, 38 MinimizatonAttempts, 133 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 339 PreInvPairs, 575 NumberOfFragments, 369 HoareAnnotationTreeSize, 339 FomulaSimplifications, 701843134945 FormulaSimplificationTreeSizeReduction, 1907.3ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 66187 FormulaSimplificationTreeSizeReductionInter, 9816.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((i == 12 || i == 4) || ((i == 16 || (i % 8 == 0 && 0 < (i + -16) / 8)) && i < SIZE + 4)) || (i < SIZE + 8 && (i == 20 || (0 == (i + 4) % 8 && 0 < (i + -20) / 8)))) || !(50000001 <= SIZE)) || i == 8) || (i == 0 && j == i / 4)) || ((i % 8 == 0 && i < SIZE + 8) && 0 < (i + -32) / 8)) || !(SIZE <= 50000001) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...