/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:09,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:09,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:09,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:47:09,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:47:09,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:47:09,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:47:09,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:09,377 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:09,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:09,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:09,379 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:09,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:09,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:09,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:09,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:09,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:09,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:09,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:09,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:09,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:09,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:09,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:09,382 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:09,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:09,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:09,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:09,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:09,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:09,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:09,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:09,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:09,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:09,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:09,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:09,848 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:09,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-23 21:47:09,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385259233/23cdcfc66e374be5a10d7a065d322bd3/FLAGa25c346b8 [2020-10-23 21:47:10,558 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:10,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-23 21:47:10,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385259233/23cdcfc66e374be5a10d7a065d322bd3/FLAGa25c346b8 [2020-10-23 21:47:10,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/385259233/23cdcfc66e374be5a10d7a065d322bd3 [2020-10-23 21:47:10,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:10,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:10,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:10,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:10,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:10,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:10" (1/1) ... [2020-10-23 21:47:10,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135cfad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:10, skipping insertion in model container [2020-10-23 21:47:10,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:10" (1/1) ... [2020-10-23 21:47:11,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:11,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:11,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:11,272 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:11,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:11,311 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:11,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11 WrapperNode [2020-10-23 21:47:11,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:11,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:11,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:11,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:11,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (1/1) ... [2020-10-23 21:47:11,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:11,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:11,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:11,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:11,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (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 [2020-10-23 21:47:11,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:11,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:11,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:11,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:11,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:47:11,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:47:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:47:11,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:11,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:11,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:11,771 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:11,771 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:47:11,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:11 BoogieIcfgContainer [2020-10-23 21:47:11,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:11,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:11,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:11,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:11,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:10" (1/3) ... [2020-10-23 21:47:11,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e57127d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:11, skipping insertion in model container [2020-10-23 21:47:11,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:11" (2/3) ... [2020-10-23 21:47:11,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e57127d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:11, skipping insertion in model container [2020-10-23 21:47:11,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:11" (3/3) ... [2020-10-23 21:47:11,783 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-23 21:47:11,797 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:11,802 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:11,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:11,881 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:11,882 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:11,882 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:11,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:11,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:11,883 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:11,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:11,883 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-23 21:47:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:47:11,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:11,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:11,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -234938568, now seen corresponding path program 1 times [2020-10-23 21:47:11,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:11,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830695829] [2020-10-23 21:47:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,038 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830695829] [2020-10-23 21:47:12,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:12,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188704719] [2020-10-23 21:47:12,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:12,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:12,291 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-10-23 21:47:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:12,479 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-23 21:47:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:12,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 21:47:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:12,488 INFO L225 Difference]: With dead ends: 73 [2020-10-23 21:47:12,488 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 21:47:12,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 21:47:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 21:47:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 21:47:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-23 21:47:12,537 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2020-10-23 21:47:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:12,537 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-23 21:47:12,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-23 21:47:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 21:47:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:12,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:12,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 872969255, now seen corresponding path program 1 times [2020-10-23 21:47:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:12,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850366299] [2020-10-23 21:47:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,545 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:12,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850366299] [2020-10-23 21:47:12,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:12,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:47:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888843270] [2020-10-23 21:47:12,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:47:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:47:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:12,638 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2020-10-23 21:47:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:12,747 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-23 21:47:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:47:12,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 21:47:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:12,751 INFO L225 Difference]: With dead ends: 67 [2020-10-23 21:47:12,751 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 21:47:12,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 21:47:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-23 21:47:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 21:47:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-23 21:47:12,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-10-23 21:47:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:12,767 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-23 21:47:12,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:47:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-23 21:47:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:47:12,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:12,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:12,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:12,769 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -568340233, now seen corresponding path program 1 times [2020-10-23 21:47:12,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:12,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724596613] [2020-10-23 21:47:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,840 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:12,842 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:12,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724596613] [2020-10-23 21:47:12,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:12,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:12,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686143437] [2020-10-23 21:47:12,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:12,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:12,955 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 6 states. [2020-10-23 21:47:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:13,123 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-23 21:47:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:47:13,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-23 21:47:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:13,126 INFO L225 Difference]: With dead ends: 78 [2020-10-23 21:47:13,126 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 21:47:13,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 21:47:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-23 21:47:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 21:47:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-23 21:47:13,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 32 [2020-10-23 21:47:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:13,141 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-23 21:47:13,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-23 21:47:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 21:47:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:13,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:13,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:47:13,144 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1329424935, now seen corresponding path program 2 times [2020-10-23 21:47:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:13,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618719210] [2020-10-23 21:47:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:13,424 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:13,426 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:13,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618719210] [2020-10-23 21:47:13,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:13,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:13,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323178995] [2020-10-23 21:47:13,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:13,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:13,533 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2020-10-23 21:47:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:13,682 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-23 21:47:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:47:13,683 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-23 21:47:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:13,684 INFO L225 Difference]: With dead ends: 57 [2020-10-23 21:47:13,684 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 21:47:13,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 21:47:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-23 21:47:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 21:47:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-23 21:47:13,694 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2020-10-23 21:47:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:13,695 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-23 21:47:13,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-23 21:47:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 21:47:13,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:13,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:13,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:47:13,698 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash 821039234, now seen corresponding path program 1 times [2020-10-23 21:47:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:13,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407133610] [2020-10-23 21:47:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:13,951 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:13,953 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:14,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407133610] [2020-10-23 21:47:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:14,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:47:14,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450959972] [2020-10-23 21:47:14,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:47:14,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:47:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:14,132 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 8 states. [2020-10-23 21:47:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:14,391 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-23 21:47:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:47:14,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-23 21:47:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:14,393 INFO L225 Difference]: With dead ends: 69 [2020-10-23 21:47:14,393 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 21:47:14,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 21:47:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-23 21:47:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 21:47:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-23 21:47:14,404 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 46 [2020-10-23 21:47:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:14,405 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-23 21:47:14,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:47:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-23 21:47:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 21:47:14,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:14,407 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:14,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:47:14,407 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1394712007, now seen corresponding path program 2 times [2020-10-23 21:47:14,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:14,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324131006] [2020-10-23 21:47:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:14,877 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:14,882 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:15,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324131006] [2020-10-23 21:47:15,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:15,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:47:15,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10073456] [2020-10-23 21:47:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:47:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:47:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:15,079 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 8 states. [2020-10-23 21:47:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:15,287 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-10-23 21:47:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 21:47:15,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-23 21:47:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:15,295 INFO L225 Difference]: With dead ends: 95 [2020-10-23 21:47:15,295 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 21:47:15,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 21:47:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-10-23 21:47:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 21:47:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-23 21:47:15,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2020-10-23 21:47:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:15,313 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-23 21:47:15,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:47:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-23 21:47:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 21:47:15,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:15,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:15,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:47:15,315 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash -876567913, now seen corresponding path program 3 times [2020-10-23 21:47:15,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:15,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063482191] [2020-10-23 21:47:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:15,765 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:15,767 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:15,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063482191] [2020-10-23 21:47:15,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:15,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:47:15,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067503415] [2020-10-23 21:47:15,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:47:15,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:47:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:15,911 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 10 states. [2020-10-23 21:47:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:16,181 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-23 21:47:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:47:16,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-23 21:47:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:16,183 INFO L225 Difference]: With dead ends: 102 [2020-10-23 21:47:16,183 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 21:47:16,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:47:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 21:47:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-10-23 21:47:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 21:47:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-23 21:47:16,195 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2020-10-23 21:47:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:16,195 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-23 21:47:16,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:47:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-23 21:47:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:47:16,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:16,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:16,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:47:16,198 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:16,198 INFO L82 PathProgramCache]: Analyzing trace with hash 501846983, now seen corresponding path program 4 times [2020-10-23 21:47:16,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:16,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981017586] [2020-10-23 21:47:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:16,627 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:16,630 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:16,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981017586] [2020-10-23 21:47:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:16,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:47:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501021] [2020-10-23 21:47:16,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:47:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:47:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:16,877 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 12 states. [2020-10-23 21:47:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:17,203 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-23 21:47:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 21:47:17,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-23 21:47:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:17,205 INFO L225 Difference]: With dead ends: 109 [2020-10-23 21:47:17,206 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 21:47:17,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:47:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 21:47:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-23 21:47:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 21:47:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-23 21:47:17,234 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 67 [2020-10-23 21:47:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:17,235 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-23 21:47:17,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:47:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-23 21:47:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 21:47:17,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:17,241 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:17,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:47:17,242 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash 70773911, now seen corresponding path program 5 times [2020-10-23 21:47:17,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:17,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400181352] [2020-10-23 21:47:17,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:17,693 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:17,695 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:17,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:17,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400181352] [2020-10-23 21:47:17,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:17,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 21:47:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146103146] [2020-10-23 21:47:17,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 21:47:17,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 21:47:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:47:17,953 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 14 states. [2020-10-23 21:47:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:18,291 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-23 21:47:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 21:47:18,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-23 21:47:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:18,297 INFO L225 Difference]: With dead ends: 116 [2020-10-23 21:47:18,300 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 21:47:18,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:47:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 21:47:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-23 21:47:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 21:47:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-23 21:47:18,326 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 74 [2020-10-23 21:47:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:18,326 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-23 21:47:18,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 21:47:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-23 21:47:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 21:47:18,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:18,334 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:18,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:47:18,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash -661976633, now seen corresponding path program 6 times [2020-10-23 21:47:18,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:18,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570213564] [2020-10-23 21:47:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:18,775 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:18,777 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:18,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:19,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570213564] [2020-10-23 21:47:19,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:19,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 21:47:19,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603327701] [2020-10-23 21:47:19,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 21:47:19,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 21:47:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:47:19,009 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 16 states. [2020-10-23 21:47:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:19,408 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2020-10-23 21:47:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 21:47:19,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-10-23 21:47:19,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:19,410 INFO L225 Difference]: With dead ends: 123 [2020-10-23 21:47:19,410 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 21:47:19,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 21:47:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-23 21:47:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 21:47:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-23 21:47:19,443 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2020-10-23 21:47:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:19,446 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-23 21:47:19,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 21:47:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-23 21:47:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 21:47:19,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:19,448 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:19,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:47:19,448 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash 220575383, now seen corresponding path program 7 times [2020-10-23 21:47:19,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:19,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393992114] [2020-10-23 21:47:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:19,891 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:19,893 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393992114] [2020-10-23 21:47:20,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:20,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 21:47:20,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542452275] [2020-10-23 21:47:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 21:47:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 21:47:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:47:20,185 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 18 states. [2020-10-23 21:47:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:20,669 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-10-23 21:47:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 21:47:20,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-23 21:47:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:20,672 INFO L225 Difference]: With dead ends: 130 [2020-10-23 21:47:20,672 INFO L226 Difference]: Without dead ends: 103 [2020-10-23 21:47:20,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-10-23 21:47:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-23 21:47:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-10-23 21:47:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-23 21:47:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-23 21:47:20,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 88 [2020-10-23 21:47:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:20,686 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-23 21:47:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 21:47:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-23 21:47:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 21:47:20,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:20,687 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:20,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:47:20,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash 140902343, now seen corresponding path program 8 times [2020-10-23 21:47:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:20,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915184953] [2020-10-23 21:47:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:21,086 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:21,089 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:21,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915184953] [2020-10-23 21:47:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 21:47:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682784589] [2020-10-23 21:47:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 21:47:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 21:47:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:47:21,400 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 20 states. [2020-10-23 21:47:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:21,923 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-10-23 21:47:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 21:47:21,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-23 21:47:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:21,930 INFO L225 Difference]: With dead ends: 137 [2020-10-23 21:47:21,930 INFO L226 Difference]: Without dead ends: 110 [2020-10-23 21:47:21,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 21:47:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-23 21:47:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-10-23 21:47:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 21:47:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-23 21:47:21,946 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-10-23 21:47:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:21,947 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-23 21:47:21,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 21:47:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-23 21:47:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 21:47:21,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:21,948 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:21,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:47:21,948 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1792409449, now seen corresponding path program 9 times [2020-10-23 21:47:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:21,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580675338] [2020-10-23 21:47:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:22,359 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:22,361 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:22,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580675338] [2020-10-23 21:47:22,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:22,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 21:47:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737440623] [2020-10-23 21:47:22,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 21:47:22,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 21:47:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-23 21:47:22,702 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 22 states. [2020-10-23 21:47:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:23,339 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2020-10-23 21:47:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 21:47:23,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-23 21:47:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:23,341 INFO L225 Difference]: With dead ends: 144 [2020-10-23 21:47:23,341 INFO L226 Difference]: Without dead ends: 117 [2020-10-23 21:47:23,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:47:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-23 21:47:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-10-23 21:47:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-23 21:47:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-23 21:47:23,355 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 102 [2020-10-23 21:47:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:23,355 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-23 21:47:23,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 21:47:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-23 21:47:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-23 21:47:23,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:23,359 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:23,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:47:23,360 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1255830983, now seen corresponding path program 10 times [2020-10-23 21:47:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:23,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187306620] [2020-10-23 21:47:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:23,743 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:23,744 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:24,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:24,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187306620] [2020-10-23 21:47:24,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:24,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 21:47:24,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876366911] [2020-10-23 21:47:24,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 21:47:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 21:47:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:47:24,183 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 24 states. [2020-10-23 21:47:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:24,851 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2020-10-23 21:47:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 21:47:24,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 109 [2020-10-23 21:47:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:24,853 INFO L225 Difference]: With dead ends: 151 [2020-10-23 21:47:24,854 INFO L226 Difference]: Without dead ends: 124 [2020-10-23 21:47:24,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 21:47:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-23 21:47:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-10-23 21:47:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 21:47:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-23 21:47:24,869 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2020-10-23 21:47:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:24,869 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-23 21:47:24,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 21:47:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-23 21:47:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-23 21:47:24,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:24,870 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:24,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:47:24,871 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash 853854871, now seen corresponding path program 11 times [2020-10-23 21:47:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:24,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362953412] [2020-10-23 21:47:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:25,247 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:25,249 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:25,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362953412] [2020-10-23 21:47:25,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 21:47:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939127837] [2020-10-23 21:47:25,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 21:47:25,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 21:47:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-23 21:47:25,657 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 26 states. [2020-10-23 21:47:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:26,466 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-23 21:47:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 21:47:26,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-10-23 21:47:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:26,469 INFO L225 Difference]: With dead ends: 158 [2020-10-23 21:47:26,469 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 21:47:26,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 21:47:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 21:47:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-10-23 21:47:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-23 21:47:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-23 21:47:26,487 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 116 [2020-10-23 21:47:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:26,487 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-23 21:47:26,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 21:47:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-23 21:47:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 21:47:26,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:26,489 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:26,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:47:26,489 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1430809543, now seen corresponding path program 12 times [2020-10-23 21:47:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:26,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148904181] [2020-10-23 21:47:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:26,915 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:26,917 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:27,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:27,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148904181] [2020-10-23 21:47:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:27,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 21:47:27,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129384655] [2020-10-23 21:47:27,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 21:47:27,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 21:47:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:27,425 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 28 states. [2020-10-23 21:47:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:28,350 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2020-10-23 21:47:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 21:47:28,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2020-10-23 21:47:28,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:28,352 INFO L225 Difference]: With dead ends: 165 [2020-10-23 21:47:28,352 INFO L226 Difference]: Without dead ends: 138 [2020-10-23 21:47:28,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 21:47:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-23 21:47:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-10-23 21:47:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-23 21:47:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2020-10-23 21:47:28,367 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 123 [2020-10-23 21:47:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:28,368 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2020-10-23 21:47:28,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 21:47:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2020-10-23 21:47:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-23 21:47:28,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:28,369 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:28,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:47:28,370 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1693848727, now seen corresponding path program 13 times [2020-10-23 21:47:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:28,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232004480] [2020-10-23 21:47:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:28,756 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:28,758 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232004480] [2020-10-23 21:47:29,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 21:47:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636564195] [2020-10-23 21:47:29,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 21:47:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 21:47:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-23 21:47:29,302 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 30 states. [2020-10-23 21:47:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:30,307 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-10-23 21:47:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 21:47:30,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 130 [2020-10-23 21:47:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:30,309 INFO L225 Difference]: With dead ends: 172 [2020-10-23 21:47:30,309 INFO L226 Difference]: Without dead ends: 145 [2020-10-23 21:47:30,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:47:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-23 21:47:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-23 21:47:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-23 21:47:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-10-23 21:47:30,331 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 130 [2020-10-23 21:47:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:30,331 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-10-23 21:47:30,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 21:47:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-10-23 21:47:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-23 21:47:30,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:30,334 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:30,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:47:30,334 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash -183508537, now seen corresponding path program 14 times [2020-10-23 21:47:30,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:30,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877747623] [2020-10-23 21:47:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:30,727 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:30,728 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:31,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877747623] [2020-10-23 21:47:31,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:31,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 21:47:31,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251240766] [2020-10-23 21:47:31,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 21:47:31,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 21:47:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-23 21:47:31,323 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 32 states. [2020-10-23 21:47:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:32,498 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2020-10-23 21:47:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 21:47:32,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2020-10-23 21:47:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:32,500 INFO L225 Difference]: With dead ends: 179 [2020-10-23 21:47:32,501 INFO L226 Difference]: Without dead ends: 152 [2020-10-23 21:47:32,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 21:47:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-23 21:47:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-10-23 21:47:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-23 21:47:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-10-23 21:47:32,517 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 137 [2020-10-23 21:47:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:32,517 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-10-23 21:47:32,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 21:47:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-10-23 21:47:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-23 21:47:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:32,519 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:32,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 21:47:32,519 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1845633385, now seen corresponding path program 15 times [2020-10-23 21:47:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:32,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991537843] [2020-10-23 21:47:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:32,895 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:32,897 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991537843] [2020-10-23 21:47:33,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:33,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 21:47:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068686263] [2020-10-23 21:47:33,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 21:47:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 21:47:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 21:47:33,569 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 34 states. [2020-10-23 21:47:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:34,865 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-23 21:47:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 21:47:34,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 144 [2020-10-23 21:47:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:34,868 INFO L225 Difference]: With dead ends: 186 [2020-10-23 21:47:34,868 INFO L226 Difference]: Without dead ends: 159 [2020-10-23 21:47:34,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 21:47:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-23 21:47:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-10-23 21:47:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-23 21:47:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-23 21:47:34,885 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 144 [2020-10-23 21:47:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:34,885 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-23 21:47:34,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 21:47:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-23 21:47:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 21:47:34,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:34,887 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:34,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 21:47:34,888 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 261150663, now seen corresponding path program 16 times [2020-10-23 21:47:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:34,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738601336] [2020-10-23 21:47:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:35,272 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:35,274 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:35,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738601336] [2020-10-23 21:47:35,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:35,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 21:47:35,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75153432] [2020-10-23 21:47:35,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 21:47:35,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 21:47:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 21:47:35,996 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 36 states. [2020-10-23 21:47:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:37,436 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2020-10-23 21:47:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 21:47:37,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2020-10-23 21:47:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:37,438 INFO L225 Difference]: With dead ends: 193 [2020-10-23 21:47:37,438 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 21:47:37,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 21:47:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 21:47:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2020-10-23 21:47:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-23 21:47:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2020-10-23 21:47:37,454 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 151 [2020-10-23 21:47:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:37,454 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2020-10-23 21:47:37,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 21:47:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2020-10-23 21:47:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-23 21:47:37,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:37,456 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:37,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 21:47:37,457 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash 144451735, now seen corresponding path program 17 times [2020-10-23 21:47:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:37,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279089739] [2020-10-23 21:47:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:37,853 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:37,854 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:38,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:38,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279089739] [2020-10-23 21:47:38,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:38,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 21:47:38,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387355199] [2020-10-23 21:47:38,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 21:47:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 21:47:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 21:47:38,690 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 38 states. [2020-10-23 21:47:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:40,270 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2020-10-23 21:47:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 21:47:40,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 158 [2020-10-23 21:47:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:40,272 INFO L225 Difference]: With dead ends: 200 [2020-10-23 21:47:40,272 INFO L226 Difference]: Without dead ends: 173 [2020-10-23 21:47:40,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 21:47:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-23 21:47:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2020-10-23 21:47:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 21:47:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-10-23 21:47:40,292 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-10-23 21:47:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:40,292 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-10-23 21:47:40,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 21:47:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-10-23 21:47:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 21:47:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:40,294 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:40,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 21:47:40,294 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1574220345, now seen corresponding path program 18 times [2020-10-23 21:47:40,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:40,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521188522] [2020-10-23 21:47:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:40,656 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:40,657 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:41,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:41,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521188522] [2020-10-23 21:47:41,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:41,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 21:47:41,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382585666] [2020-10-23 21:47:41,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 21:47:41,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 21:47:41,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:47:41,568 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 40 states. [2020-10-23 21:47:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:43,181 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2020-10-23 21:47:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 21:47:43,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 165 [2020-10-23 21:47:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:43,188 INFO L225 Difference]: With dead ends: 207 [2020-10-23 21:47:43,188 INFO L226 Difference]: Without dead ends: 180 [2020-10-23 21:47:43,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 21:47:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-23 21:47:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2020-10-23 21:47:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-23 21:47:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-23 21:47:43,216 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 165 [2020-10-23 21:47:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:43,216 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-23 21:47:43,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 21:47:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-23 21:47:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-23 21:47:43,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:43,218 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:43,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 21:47:43,218 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash -9375081, now seen corresponding path program 19 times [2020-10-23 21:47:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:43,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967944317] [2020-10-23 21:47:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:43,579 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:43,580 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:44,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:44,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967944317] [2020-10-23 21:47:44,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:44,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 21:47:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715522112] [2020-10-23 21:47:44,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 21:47:44,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 21:47:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 21:47:44,551 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 42 states. [2020-10-23 21:47:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:46,423 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-10-23 21:47:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 21:47:46,424 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 172 [2020-10-23 21:47:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:46,426 INFO L225 Difference]: With dead ends: 214 [2020-10-23 21:47:46,426 INFO L226 Difference]: Without dead ends: 187 [2020-10-23 21:47:46,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 21:47:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-23 21:47:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2020-10-23 21:47:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-23 21:47:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-10-23 21:47:46,450 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 172 [2020-10-23 21:47:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:46,450 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-10-23 21:47:46,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 21:47:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-10-23 21:47:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-23 21:47:46,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:46,452 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:46,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 21:47:46,452 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1036041273, now seen corresponding path program 20 times [2020-10-23 21:47:46,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:46,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607357288] [2020-10-23 21:47:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:46,814 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:46,817 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:47,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:47,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607357288] [2020-10-23 21:47:47,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:47,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 21:47:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499967949] [2020-10-23 21:47:47,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 21:47:47,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 21:47:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 21:47:47,964 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 44 states. [2020-10-23 21:47:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:49,790 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-10-23 21:47:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-23 21:47:49,791 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-10-23 21:47:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:49,793 INFO L225 Difference]: With dead ends: 221 [2020-10-23 21:47:49,793 INFO L226 Difference]: Without dead ends: 194 [2020-10-23 21:47:49,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 21:47:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-23 21:47:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2020-10-23 21:47:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-23 21:47:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2020-10-23 21:47:49,815 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 179 [2020-10-23 21:47:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:49,816 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2020-10-23 21:47:49,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 21:47:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2020-10-23 21:47:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-23 21:47:49,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:49,817 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:49,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 21:47:49,817 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1793311593, now seen corresponding path program 21 times [2020-10-23 21:47:49,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:49,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117206828] [2020-10-23 21:47:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:50,217 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:50,219 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:51,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:51,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117206828] [2020-10-23 21:47:51,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:51,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 21:47:51,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113893042] [2020-10-23 21:47:51,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 21:47:51,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 21:47:51,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 21:47:51,430 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 46 states. [2020-10-23 21:47:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:53,402 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2020-10-23 21:47:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-23 21:47:53,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 186 [2020-10-23 21:47:53,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:53,405 INFO L225 Difference]: With dead ends: 228 [2020-10-23 21:47:53,405 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 21:47:53,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 21:47:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 21:47:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-23 21:47:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-23 21:47:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2020-10-23 21:47:53,439 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 186 [2020-10-23 21:47:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:53,440 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2020-10-23 21:47:53,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 21:47:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2020-10-23 21:47:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-23 21:47:53,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:53,441 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:53,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 21:47:53,442 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1658013241, now seen corresponding path program 22 times [2020-10-23 21:47:53,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:53,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761739006] [2020-10-23 21:47:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:53,822 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:53,824 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:55,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761739006] [2020-10-23 21:47:55,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:55,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 21:47:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470073849] [2020-10-23 21:47:55,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 21:47:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 21:47:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 21:47:55,143 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 48 states. [2020-10-23 21:47:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:57,445 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2020-10-23 21:47:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-23 21:47:57,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 193 [2020-10-23 21:47:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:57,448 INFO L225 Difference]: With dead ends: 235 [2020-10-23 21:47:57,448 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 21:47:57,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 21:47:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 21:47:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2020-10-23 21:47:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-23 21:47:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-10-23 21:47:57,474 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 193 [2020-10-23 21:47:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:57,474 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-10-23 21:47:57,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 21:47:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-10-23 21:47:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-23 21:47:57,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:57,476 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:57,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 21:47:57,476 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -801241449, now seen corresponding path program 23 times [2020-10-23 21:47:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:57,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494083380] [2020-10-23 21:47:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:57,877 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:57,879 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:59,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494083380] [2020-10-23 21:47:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:59,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-10-23 21:47:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345407210] [2020-10-23 21:47:59,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-23 21:47:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-23 21:47:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 21:47:59,259 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 50 states. [2020-10-23 21:48:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:01,738 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2020-10-23 21:48:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-23 21:48:01,739 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 200 [2020-10-23 21:48:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:01,741 INFO L225 Difference]: With dead ends: 242 [2020-10-23 21:48:01,741 INFO L226 Difference]: Without dead ends: 215 [2020-10-23 21:48:01,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-10-23 21:48:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-23 21:48:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2020-10-23 21:48:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-23 21:48:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-10-23 21:48:01,768 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 200 [2020-10-23 21:48:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:01,768 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-10-23 21:48:01,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-23 21:48:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-10-23 21:48:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-23 21:48:01,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:01,770 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:01,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 21:48:01,770 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2018750407, now seen corresponding path program 24 times [2020-10-23 21:48:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:01,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424114161] [2020-10-23 21:48:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:02,158 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:02,159 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:03,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424114161] [2020-10-23 21:48:03,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:03,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 21:48:03,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41749157] [2020-10-23 21:48:03,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 21:48:03,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 21:48:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 21:48:03,704 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 52 states. [2020-10-23 21:48:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:06,457 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2020-10-23 21:48:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-23 21:48:06,457 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2020-10-23 21:48:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:06,459 INFO L225 Difference]: With dead ends: 249 [2020-10-23 21:48:06,459 INFO L226 Difference]: Without dead ends: 222 [2020-10-23 21:48:06,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 21:48:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-23 21:48:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2020-10-23 21:48:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-23 21:48:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2020-10-23 21:48:06,493 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2020-10-23 21:48:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:06,493 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2020-10-23 21:48:06,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 21:48:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2020-10-23 21:48:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-23 21:48:06,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:06,495 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:06,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 21:48:06,495 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1619636073, now seen corresponding path program 25 times [2020-10-23 21:48:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:06,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794794546] [2020-10-23 21:48:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:06,874 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:06,875 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:08,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:08,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794794546] [2020-10-23 21:48:08,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:08,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-10-23 21:48:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965515706] [2020-10-23 21:48:08,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-23 21:48:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-23 21:48:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 21:48:08,549 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 54 states. [2020-10-23 21:48:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:11,164 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2020-10-23 21:48:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 21:48:11,165 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 214 [2020-10-23 21:48:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:11,168 INFO L225 Difference]: With dead ends: 256 [2020-10-23 21:48:11,168 INFO L226 Difference]: Without dead ends: 229 [2020-10-23 21:48:11,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-10-23 21:48:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-23 21:48:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 224. [2020-10-23 21:48:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-23 21:48:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-10-23 21:48:11,212 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 214 [2020-10-23 21:48:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:11,213 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-10-23 21:48:11,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-23 21:48:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-10-23 21:48:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-23 21:48:11,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:11,214 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:11,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 21:48:11,215 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:11,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1324079673, now seen corresponding path program 26 times [2020-10-23 21:48:11,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:11,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077793438] [2020-10-23 21:48:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:11,621 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:11,623 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:13,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:13,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077793438] [2020-10-23 21:48:13,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:13,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 21:48:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045435659] [2020-10-23 21:48:13,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 21:48:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 21:48:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:48:13,402 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 56 states. [2020-10-23 21:48:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:16,557 INFO L93 Difference]: Finished difference Result 263 states and 267 transitions. [2020-10-23 21:48:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-23 21:48:16,558 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-10-23 21:48:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:16,560 INFO L225 Difference]: With dead ends: 263 [2020-10-23 21:48:16,560 INFO L226 Difference]: Without dead ends: 236 [2020-10-23 21:48:16,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-10-23 21:48:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-23 21:48:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2020-10-23 21:48:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-23 21:48:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-10-23 21:48:16,593 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-10-23 21:48:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:16,593 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-10-23 21:48:16,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 21:48:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-10-23 21:48:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-23 21:48:16,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:16,594 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:16,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 21:48:16,595 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -647685481, now seen corresponding path program 27 times [2020-10-23 21:48:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:16,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585230254] [2020-10-23 21:48:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:17,003 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:17,005 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:18,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585230254] [2020-10-23 21:48:18,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:18,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-10-23 21:48:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644960046] [2020-10-23 21:48:18,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 21:48:18,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 21:48:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 21:48:18,934 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 58 states. [2020-10-23 21:48:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:22,322 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2020-10-23 21:48:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-23 21:48:22,323 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 228 [2020-10-23 21:48:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:22,325 INFO L225 Difference]: With dead ends: 270 [2020-10-23 21:48:22,326 INFO L226 Difference]: Without dead ends: 243 [2020-10-23 21:48:22,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-10-23 21:48:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-23 21:48:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2020-10-23 21:48:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-23 21:48:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2020-10-23 21:48:22,364 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 228 [2020-10-23 21:48:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:22,365 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2020-10-23 21:48:22,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 21:48:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2020-10-23 21:48:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-23 21:48:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:22,366 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:22,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 21:48:22,367 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1127343161, now seen corresponding path program 28 times [2020-10-23 21:48:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:22,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542170123] [2020-10-23 21:48:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:22,782 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:22,784 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:24,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542170123] [2020-10-23 21:48:24,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:24,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-10-23 21:48:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659764036] [2020-10-23 21:48:24,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 21:48:24,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 21:48:24,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 21:48:24,871 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand 60 states. [2020-10-23 21:48:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:28,315 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2020-10-23 21:48:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-23 21:48:28,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 235 [2020-10-23 21:48:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:28,318 INFO L225 Difference]: With dead ends: 277 [2020-10-23 21:48:28,318 INFO L226 Difference]: Without dead ends: 250 [2020-10-23 21:48:28,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-10-23 21:48:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-23 21:48:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2020-10-23 21:48:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-23 21:48:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2020-10-23 21:48:28,363 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 235 [2020-10-23 21:48:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2020-10-23 21:48:28,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 21:48:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2020-10-23 21:48:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-23 21:48:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:28,365 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 21:48:28,365 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1017799831, now seen corresponding path program 29 times [2020-10-23 21:48:28,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:28,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939210796] [2020-10-23 21:48:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:28,781 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:28,783 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:30,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939210796] [2020-10-23 21:48:31,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:31,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-10-23 21:48:31,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577338659] [2020-10-23 21:48:31,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-23 21:48:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:31,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-23 21:48:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 21:48:31,006 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 62 states. [2020-10-23 21:48:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:34,905 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-10-23 21:48:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-23 21:48:34,906 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2020-10-23 21:48:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:34,908 INFO L225 Difference]: With dead ends: 284 [2020-10-23 21:48:34,908 INFO L226 Difference]: Without dead ends: 257 [2020-10-23 21:48:34,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 21:48:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-23 21:48:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2020-10-23 21:48:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-23 21:48:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2020-10-23 21:48:34,948 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 242 [2020-10-23 21:48:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:34,949 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2020-10-23 21:48:34,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-23 21:48:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2020-10-23 21:48:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-23 21:48:34,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:34,950 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:34,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 21:48:34,951 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash 685871559, now seen corresponding path program 30 times [2020-10-23 21:48:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994005770] [2020-10-23 21:48:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:35,368 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:35,370 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:37,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994005770] [2020-10-23 21:48:37,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:37,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-10-23 21:48:37,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481821623] [2020-10-23 21:48:37,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 21:48:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 21:48:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 21:48:37,790 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand 64 states. [2020-10-23 21:48:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:41,934 INFO L93 Difference]: Finished difference Result 291 states and 295 transitions. [2020-10-23 21:48:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-23 21:48:41,935 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 249 [2020-10-23 21:48:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:41,937 INFO L225 Difference]: With dead ends: 291 [2020-10-23 21:48:41,937 INFO L226 Difference]: Without dead ends: 264 [2020-10-23 21:48:41,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-10-23 21:48:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-23 21:48:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2020-10-23 21:48:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-23 21:48:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2020-10-23 21:48:41,986 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 249 [2020-10-23 21:48:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:41,987 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2020-10-23 21:48:41,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 21:48:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2020-10-23 21:48:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-23 21:48:41,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:41,988 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:41,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 21:48:41,989 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1877356183, now seen corresponding path program 31 times [2020-10-23 21:48:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930430883] [2020-10-23 21:48:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:42,393 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:42,394 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:44,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930430883] [2020-10-23 21:48:44,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:44,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-10-23 21:48:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323866721] [2020-10-23 21:48:44,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-23 21:48:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-23 21:48:44,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 21:48:44,968 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand 66 states. [2020-10-23 21:48:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:49,404 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2020-10-23 21:48:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-23 21:48:49,405 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-10-23 21:48:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:49,407 INFO L225 Difference]: With dead ends: 298 [2020-10-23 21:48:49,407 INFO L226 Difference]: Without dead ends: 271 [2020-10-23 21:48:49,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-10-23 21:48:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-23 21:48:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 266. [2020-10-23 21:48:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-23 21:48:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2020-10-23 21:48:49,447 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 256 [2020-10-23 21:48:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:49,447 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2020-10-23 21:48:49,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-23 21:48:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2020-10-23 21:48:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-23 21:48:49,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:49,449 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:49,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 21:48:49,449 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1699838009, now seen corresponding path program 32 times [2020-10-23 21:48:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:49,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117023755] [2020-10-23 21:48:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:49,857 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:49,859 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:52,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:48:52,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117023755] [2020-10-23 21:48:52,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:52,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-10-23 21:48:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564900980] [2020-10-23 21:48:52,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-23 21:48:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-23 21:48:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 21:48:52,603 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 68 states. [2020-10-23 21:48:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:56,986 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2020-10-23 21:48:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-23 21:48:56,987 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 263 [2020-10-23 21:48:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:56,989 INFO L225 Difference]: With dead ends: 305 [2020-10-23 21:48:56,989 INFO L226 Difference]: Without dead ends: 278 [2020-10-23 21:48:56,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-10-23 21:48:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-23 21:48:57,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2020-10-23 21:48:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-23 21:48:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2020-10-23 21:48:57,040 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 263 [2020-10-23 21:48:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:57,040 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2020-10-23 21:48:57,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-23 21:48:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2020-10-23 21:48:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-23 21:48:57,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:57,042 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:57,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 21:48:57,042 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash 28866711, now seen corresponding path program 33 times [2020-10-23 21:48:57,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:57,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242421150] [2020-10-23 21:48:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:57,477 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:57,478 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:00,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242421150] [2020-10-23 21:49:00,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:00,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-10-23 21:49:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746067382] [2020-10-23 21:49:00,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-23 21:49:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-23 21:49:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 21:49:00,494 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand 70 states. [2020-10-23 21:49:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:05,513 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2020-10-23 21:49:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-23 21:49:05,514 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-10-23 21:49:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:05,517 INFO L225 Difference]: With dead ends: 312 [2020-10-23 21:49:05,517 INFO L226 Difference]: Without dead ends: 285 [2020-10-23 21:49:05,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-10-23 21:49:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-23 21:49:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 280. [2020-10-23 21:49:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-23 21:49:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2020-10-23 21:49:05,572 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 270 [2020-10-23 21:49:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:05,572 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2020-10-23 21:49:05,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-23 21:49:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2020-10-23 21:49:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-23 21:49:05,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:05,574 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:05,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 21:49:05,575 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:05,575 INFO L82 PathProgramCache]: Analyzing trace with hash -812319289, now seen corresponding path program 34 times [2020-10-23 21:49:05,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:05,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121161702] [2020-10-23 21:49:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:06,003 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:06,004 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:09,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:09,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121161702] [2020-10-23 21:49:09,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:09,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-10-23 21:49:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361730345] [2020-10-23 21:49:09,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-23 21:49:09,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-23 21:49:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 21:49:09,227 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 72 states. [2020-10-23 21:49:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:14,529 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2020-10-23 21:49:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 21:49:14,530 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 277 [2020-10-23 21:49:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:14,532 INFO L225 Difference]: With dead ends: 319 [2020-10-23 21:49:14,532 INFO L226 Difference]: Without dead ends: 292 [2020-10-23 21:49:14,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-10-23 21:49:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-23 21:49:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 287. [2020-10-23 21:49:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-23 21:49:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2020-10-23 21:49:14,574 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 277 [2020-10-23 21:49:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:14,574 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2020-10-23 21:49:14,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-23 21:49:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2020-10-23 21:49:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-23 21:49:14,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:14,576 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 21:49:14,576 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1757495959, now seen corresponding path program 35 times [2020-10-23 21:49:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:14,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924762936] [2020-10-23 21:49:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:15,018 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:15,020 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:18,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:18,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924762936] [2020-10-23 21:49:18,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:18,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-10-23 21:49:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102723857] [2020-10-23 21:49:18,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-23 21:49:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:18,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-23 21:49:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 21:49:18,455 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand 74 states. [2020-10-23 21:49:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:24,151 INFO L93 Difference]: Finished difference Result 326 states and 330 transitions. [2020-10-23 21:49:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-23 21:49:24,152 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 284 [2020-10-23 21:49:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:24,154 INFO L225 Difference]: With dead ends: 326 [2020-10-23 21:49:24,154 INFO L226 Difference]: Without dead ends: 299 [2020-10-23 21:49:24,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-10-23 21:49:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-23 21:49:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2020-10-23 21:49:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-23 21:49:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-10-23 21:49:24,209 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-10-23 21:49:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:24,209 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-10-23 21:49:24,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-23 21:49:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-10-23 21:49:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-23 21:49:24,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:24,211 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:24,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 21:49:24,212 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1661668409, now seen corresponding path program 36 times [2020-10-23 21:49:24,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:24,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172463886] [2020-10-23 21:49:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:24,643 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:24,645 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:28,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:28,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172463886] [2020-10-23 21:49:28,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:28,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-10-23 21:49:28,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297950015] [2020-10-23 21:49:28,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-23 21:49:28,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:28,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-23 21:49:28,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 21:49:28,188 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 76 states. [2020-10-23 21:49:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:33,998 INFO L93 Difference]: Finished difference Result 333 states and 337 transitions. [2020-10-23 21:49:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-23 21:49:33,999 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 291 [2020-10-23 21:49:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:34,001 INFO L225 Difference]: With dead ends: 333 [2020-10-23 21:49:34,001 INFO L226 Difference]: Without dead ends: 306 [2020-10-23 21:49:34,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-10-23 21:49:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-23 21:49:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2020-10-23 21:49:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-23 21:49:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2020-10-23 21:49:34,068 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 291 [2020-10-23 21:49:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2020-10-23 21:49:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-23 21:49:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2020-10-23 21:49:34,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-23 21:49:34,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:34,070 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:34,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 21:49:34,070 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 60853399, now seen corresponding path program 37 times [2020-10-23 21:49:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:34,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148183900] [2020-10-23 21:49:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:34,513 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:34,515 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:38,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:38,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148183900] [2020-10-23 21:49:38,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:38,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-10-23 21:49:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905731531] [2020-10-23 21:49:38,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-23 21:49:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-23 21:49:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-10-23 21:49:38,332 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 78 states. [2020-10-23 21:49:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:44,193 INFO L93 Difference]: Finished difference Result 340 states and 344 transitions. [2020-10-23 21:49:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-23 21:49:44,194 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 298 [2020-10-23 21:49:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:44,197 INFO L225 Difference]: With dead ends: 340 [2020-10-23 21:49:44,197 INFO L226 Difference]: Without dead ends: 313 [2020-10-23 21:49:44,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-10-23 21:49:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-23 21:49:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2020-10-23 21:49:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-23 21:49:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2020-10-23 21:49:44,264 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 298 [2020-10-23 21:49:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:44,265 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2020-10-23 21:49:44,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-23 21:49:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2020-10-23 21:49:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-23 21:49:44,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:44,267 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:44,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 21:49:44,267 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -265393721, now seen corresponding path program 38 times [2020-10-23 21:49:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:44,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167039075] [2020-10-23 21:49:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:44,728 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:44,729 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:48,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:48,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167039075] [2020-10-23 21:49:48,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-10-23 21:49:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658643078] [2020-10-23 21:49:48,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-23 21:49:48,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-23 21:49:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 21:49:48,829 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand 80 states. [2020-10-23 21:49:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:55,024 INFO L93 Difference]: Finished difference Result 347 states and 351 transitions. [2020-10-23 21:49:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-23 21:49:55,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 305 [2020-10-23 21:49:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:55,028 INFO L225 Difference]: With dead ends: 347 [2020-10-23 21:49:55,028 INFO L226 Difference]: Without dead ends: 320 [2020-10-23 21:49:55,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-10-23 21:49:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-23 21:49:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 315. [2020-10-23 21:49:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-23 21:49:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2020-10-23 21:49:55,082 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 305 [2020-10-23 21:49:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:55,082 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2020-10-23 21:49:55,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-23 21:49:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2020-10-23 21:49:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-23 21:49:55,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:55,084 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:55,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 21:49:55,085 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 418797207, now seen corresponding path program 39 times [2020-10-23 21:49:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:55,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558920222] [2020-10-23 21:49:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:55,527 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:55,528 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:59,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:49:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558920222] [2020-10-23 21:49:59,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:59,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-10-23 21:49:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42526515] [2020-10-23 21:49:59,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-23 21:49:59,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-23 21:49:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 21:49:59,849 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 82 states. [2020-10-23 21:50:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:06,687 INFO L93 Difference]: Finished difference Result 354 states and 358 transitions. [2020-10-23 21:50:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-23 21:50:06,688 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 312 [2020-10-23 21:50:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:06,691 INFO L225 Difference]: With dead ends: 354 [2020-10-23 21:50:06,691 INFO L226 Difference]: Without dead ends: 327 [2020-10-23 21:50:06,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-10-23 21:50:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-23 21:50:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2020-10-23 21:50:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-23 21:50:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2020-10-23 21:50:06,772 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 312 [2020-10-23 21:50:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:06,772 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2020-10-23 21:50:06,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-23 21:50:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2020-10-23 21:50:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 21:50:06,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:06,774 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:06,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 21:50:06,775 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash -828284985, now seen corresponding path program 40 times [2020-10-23 21:50:06,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:06,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625431915] [2020-10-23 21:50:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:07,252 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:07,254 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:11,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625431915] [2020-10-23 21:50:11,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:11,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-10-23 21:50:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797225652] [2020-10-23 21:50:11,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-23 21:50:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-23 21:50:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 21:50:11,836 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand 84 states. [2020-10-23 21:50:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:19,475 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2020-10-23 21:50:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-23 21:50:19,476 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 319 [2020-10-23 21:50:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:19,479 INFO L225 Difference]: With dead ends: 361 [2020-10-23 21:50:19,479 INFO L226 Difference]: Without dead ends: 334 [2020-10-23 21:50:19,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-10-23 21:50:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-23 21:50:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 329. [2020-10-23 21:50:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-23 21:50:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2020-10-23 21:50:19,578 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 319 [2020-10-23 21:50:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:19,579 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2020-10-23 21:50:19,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-23 21:50:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2020-10-23 21:50:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-23 21:50:19,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:19,581 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:19,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 21:50:19,581 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash -681402217, now seen corresponding path program 41 times [2020-10-23 21:50:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:19,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61312421] [2020-10-23 21:50:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:20,061 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:20,063 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:24,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61312421] [2020-10-23 21:50:24,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:24,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-10-23 21:50:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519149160] [2020-10-23 21:50:25,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-23 21:50:25,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-23 21:50:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-10-23 21:50:25,001 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand 86 states. [2020-10-23 21:50:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:33,119 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2020-10-23 21:50:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-23 21:50:33,120 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 326 [2020-10-23 21:50:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:33,122 INFO L225 Difference]: With dead ends: 368 [2020-10-23 21:50:33,122 INFO L226 Difference]: Without dead ends: 341 [2020-10-23 21:50:33,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-10-23 21:50:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-23 21:50:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 336. [2020-10-23 21:50:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-23 21:50:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2020-10-23 21:50:33,206 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 326 [2020-10-23 21:50:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:33,206 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2020-10-23 21:50:33,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-23 21:50:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2020-10-23 21:50:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 21:50:33,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:33,207 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:33,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-23 21:50:33,208 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1437455815, now seen corresponding path program 42 times [2020-10-23 21:50:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:33,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344672547] [2020-10-23 21:50:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:33,692 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:33,693 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:38,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:38,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344672547] [2020-10-23 21:50:38,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:38,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-10-23 21:50:38,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930605628] [2020-10-23 21:50:38,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-23 21:50:38,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:38,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-23 21:50:38,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 21:50:38,926 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 88 states. [2020-10-23 21:50:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:47,559 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2020-10-23 21:50:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-23 21:50:47,560 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 333 [2020-10-23 21:50:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:47,563 INFO L225 Difference]: With dead ends: 375 [2020-10-23 21:50:47,563 INFO L226 Difference]: Without dead ends: 348 [2020-10-23 21:50:47,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-10-23 21:50:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-23 21:50:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2020-10-23 21:50:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-23 21:50:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2020-10-23 21:50:47,637 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 333 [2020-10-23 21:50:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:47,637 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2020-10-23 21:50:47,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-23 21:50:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2020-10-23 21:50:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-23 21:50:47,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:47,639 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:47,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-23 21:50:47,639 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1434806935, now seen corresponding path program 43 times [2020-10-23 21:50:47,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:47,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218641847] [2020-10-23 21:50:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:48,138 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:48,140 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:50:53,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218641847] [2020-10-23 21:50:53,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:53,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-10-23 21:50:53,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768098549] [2020-10-23 21:50:53,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-23 21:50:53,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-23 21:50:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 21:50:53,709 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 90 states. [2020-10-23 21:51:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:02,924 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2020-10-23 21:51:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-23 21:51:02,926 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 340 [2020-10-23 21:51:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:02,928 INFO L225 Difference]: With dead ends: 382 [2020-10-23 21:51:02,928 INFO L226 Difference]: Without dead ends: 355 [2020-10-23 21:51:02,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-10-23 21:51:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-23 21:51:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 350. [2020-10-23 21:51:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-23 21:51:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 352 transitions. [2020-10-23 21:51:03,000 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 352 transitions. Word has length 340 [2020-10-23 21:51:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:03,000 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 352 transitions. [2020-10-23 21:51:03,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-23 21:51:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 352 transitions. [2020-10-23 21:51:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-23 21:51:03,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:03,003 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:03,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-23 21:51:03,003 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:03,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1162622009, now seen corresponding path program 44 times [2020-10-23 21:51:03,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:03,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642157226] [2020-10-23 21:51:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:03,511 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:03,512 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:09,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:09,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642157226] [2020-10-23 21:51:09,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:09,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-10-23 21:51:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260798028] [2020-10-23 21:51:09,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-23 21:51:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-23 21:51:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 21:51:09,488 INFO L87 Difference]: Start difference. First operand 350 states and 352 transitions. Second operand 92 states. [2020-10-23 21:51:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:19,083 INFO L93 Difference]: Finished difference Result 389 states and 393 transitions. [2020-10-23 21:51:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-23 21:51:19,085 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 347 [2020-10-23 21:51:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:19,087 INFO L225 Difference]: With dead ends: 389 [2020-10-23 21:51:19,087 INFO L226 Difference]: Without dead ends: 362 [2020-10-23 21:51:19,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-10-23 21:51:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-23 21:51:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 357. [2020-10-23 21:51:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-23 21:51:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-10-23 21:51:19,202 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-10-23 21:51:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:19,203 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-10-23 21:51:19,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-23 21:51:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-10-23 21:51:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-10-23 21:51:19,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:19,204 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:19,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-23 21:51:19,205 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1845578601, now seen corresponding path program 45 times [2020-10-23 21:51:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:19,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954348385] [2020-10-23 21:51:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:19,715 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:19,717 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:26,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954348385] [2020-10-23 21:51:26,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:26,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-10-23 21:51:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874013751] [2020-10-23 21:51:26,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-23 21:51:26,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:26,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-23 21:51:26,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-10-23 21:51:26,066 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 94 states. [2020-10-23 21:51:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:36,286 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2020-10-23 21:51:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-10-23 21:51:36,288 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 354 [2020-10-23 21:51:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:36,290 INFO L225 Difference]: With dead ends: 396 [2020-10-23 21:51:36,290 INFO L226 Difference]: Without dead ends: 369 [2020-10-23 21:51:36,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-10-23 21:51:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-23 21:51:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2020-10-23 21:51:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-23 21:51:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2020-10-23 21:51:36,366 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 354 [2020-10-23 21:51:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:36,366 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2020-10-23 21:51:36,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-23 21:51:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2020-10-23 21:51:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-10-23 21:51:36,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:36,368 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:36,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-23 21:51:36,368 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:36,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1259553223, now seen corresponding path program 46 times [2020-10-23 21:51:36,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:36,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737511647] [2020-10-23 21:51:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:36,903 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:36,904 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:43,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:51:43,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737511647] [2020-10-23 21:51:43,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:43,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-10-23 21:51:43,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318476349] [2020-10-23 21:51:43,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-23 21:51:43,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-23 21:51:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-10-23 21:51:43,734 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand 96 states. [2020-10-23 21:51:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:54,728 INFO L93 Difference]: Finished difference Result 403 states and 407 transitions. [2020-10-23 21:51:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-10-23 21:51:54,730 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 361 [2020-10-23 21:51:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:54,733 INFO L225 Difference]: With dead ends: 403 [2020-10-23 21:51:54,734 INFO L226 Difference]: Without dead ends: 376 [2020-10-23 21:51:54,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-10-23 21:51:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-23 21:51:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 371. [2020-10-23 21:51:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-23 21:51:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2020-10-23 21:51:54,843 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 361 [2020-10-23 21:51:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:54,843 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2020-10-23 21:51:54,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-23 21:51:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2020-10-23 21:51:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-10-23 21:51:54,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:54,846 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:54,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-23 21:51:54,846 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1936621207, now seen corresponding path program 47 times [2020-10-23 21:51:54,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:54,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021441165] [2020-10-23 21:51:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:55,410 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:55,411 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:02,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021441165] [2020-10-23 21:52:02,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:02,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-10-23 21:52:02,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805876365] [2020-10-23 21:52:02,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-10-23 21:52:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:02,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-10-23 21:52:02,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-10-23 21:52:02,791 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand 98 states. [2020-10-23 21:52:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:15,113 INFO L93 Difference]: Finished difference Result 410 states and 414 transitions. [2020-10-23 21:52:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-23 21:52:15,114 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 368 [2020-10-23 21:52:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:15,118 INFO L225 Difference]: With dead ends: 410 [2020-10-23 21:52:15,118 INFO L226 Difference]: Without dead ends: 383 [2020-10-23 21:52:15,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-10-23 21:52:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-23 21:52:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 378. [2020-10-23 21:52:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-23 21:52:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 380 transitions. [2020-10-23 21:52:15,224 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 380 transitions. Word has length 368 [2020-10-23 21:52:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:15,225 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 380 transitions. [2020-10-23 21:52:15,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-10-23 21:52:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 380 transitions. [2020-10-23 21:52:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-23 21:52:15,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:15,227 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:15,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-23 21:52:15,227 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1814837191, now seen corresponding path program 48 times [2020-10-23 21:52:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:15,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666238957] [2020-10-23 21:52:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:15,774 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:15,775 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:23,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666238957] [2020-10-23 21:52:23,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:23,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-10-23 21:52:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125923298] [2020-10-23 21:52:23,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-23 21:52:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-23 21:52:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 21:52:23,742 INFO L87 Difference]: Start difference. First operand 378 states and 380 transitions. Second operand 100 states. [2020-10-23 21:52:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:36,568 INFO L93 Difference]: Finished difference Result 417 states and 421 transitions. [2020-10-23 21:52:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-10-23 21:52:36,569 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 375 [2020-10-23 21:52:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:36,571 INFO L225 Difference]: With dead ends: 417 [2020-10-23 21:52:36,572 INFO L226 Difference]: Without dead ends: 390 [2020-10-23 21:52:36,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-10-23 21:52:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-23 21:52:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 385. [2020-10-23 21:52:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-23 21:52:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 387 transitions. [2020-10-23 21:52:36,672 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 387 transitions. Word has length 375 [2020-10-23 21:52:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:36,672 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 387 transitions. [2020-10-23 21:52:36,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-23 21:52:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 387 transitions. [2020-10-23 21:52:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-23 21:52:36,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:36,675 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:36,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-23 21:52:36,675 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash -931870569, now seen corresponding path program 49 times [2020-10-23 21:52:36,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:36,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911950480] [2020-10-23 21:52:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:37,263 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:37,264 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:45,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:52:46,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911950480] [2020-10-23 21:52:46,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:46,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-10-23 21:52:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263436065] [2020-10-23 21:52:46,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-23 21:52:46,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-23 21:52:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-10-23 21:52:46,015 INFO L87 Difference]: Start difference. First operand 385 states and 387 transitions. Second operand 102 states. [2020-10-23 21:53:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:00,380 INFO L93 Difference]: Finished difference Result 424 states and 428 transitions. [2020-10-23 21:53:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-23 21:53:00,382 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 382 [2020-10-23 21:53:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:00,385 INFO L225 Difference]: With dead ends: 424 [2020-10-23 21:53:00,385 INFO L226 Difference]: Without dead ends: 397 [2020-10-23 21:53:00,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-10-23 21:53:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-23 21:53:00,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 392. [2020-10-23 21:53:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-23 21:53:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2020-10-23 21:53:00,494 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 382 [2020-10-23 21:53:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:00,494 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2020-10-23 21:53:00,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-23 21:53:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2020-10-23 21:53:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-23 21:53:00,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:00,496 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:00,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-23 21:53:00,496 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1688293945, now seen corresponding path program 50 times [2020-10-23 21:53:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691050137] [2020-10-23 21:53:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:01,084 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:01,085 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:09,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:53:10,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691050137] [2020-10-23 21:53:10,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:10,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-10-23 21:53:10,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816323261] [2020-10-23 21:53:10,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-10-23 21:53:10,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-10-23 21:53:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-10-23 21:53:10,083 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand 104 states. [2020-10-23 21:53:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:24,966 INFO L93 Difference]: Finished difference Result 431 states and 435 transitions. [2020-10-23 21:53:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-10-23 21:53:24,967 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 389 [2020-10-23 21:53:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:24,970 INFO L225 Difference]: With dead ends: 431 [2020-10-23 21:53:24,970 INFO L226 Difference]: Without dead ends: 404 [2020-10-23 21:53:24,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-10-23 21:53:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-23 21:53:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2020-10-23 21:53:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-23 21:53:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 401 transitions. [2020-10-23 21:53:25,091 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 401 transitions. Word has length 389 [2020-10-23 21:53:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:25,091 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 401 transitions. [2020-10-23 21:53:25,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-10-23 21:53:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 401 transitions. [2020-10-23 21:53:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-23 21:53:25,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:25,093 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:25,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-23 21:53:25,093 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1202819735, now seen corresponding path program 51 times [2020-10-23 21:53:25,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:25,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320153173] [2020-10-23 21:53:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:25,721 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:25,723 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:35,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:53:35,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320153173] [2020-10-23 21:53:35,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:35,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-10-23 21:53:35,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505750738] [2020-10-23 21:53:35,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-23 21:53:35,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:35,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-23 21:53:35,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-10-23 21:53:35,794 INFO L87 Difference]: Start difference. First operand 399 states and 401 transitions. Second operand 106 states. [2020-10-23 21:53:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:52,294 INFO L93 Difference]: Finished difference Result 438 states and 442 transitions. [2020-10-23 21:53:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-10-23 21:53:52,295 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 396 [2020-10-23 21:53:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:52,297 INFO L225 Difference]: With dead ends: 438 [2020-10-23 21:53:52,298 INFO L226 Difference]: Without dead ends: 411 [2020-10-23 21:53:52,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-10-23 21:53:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-23 21:53:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2020-10-23 21:53:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-23 21:53:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2020-10-23 21:53:52,419 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 396 [2020-10-23 21:53:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:52,419 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2020-10-23 21:53:52,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-23 21:53:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2020-10-23 21:53:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-10-23 21:53:52,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:52,421 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:52,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-23 21:53:52,421 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:52,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1846191047, now seen corresponding path program 52 times [2020-10-23 21:53:52,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:52,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116786463] [2020-10-23 21:53:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:53,152 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:53,154 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:54:03,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116786463] [2020-10-23 21:54:03,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:03,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-10-23 21:54:03,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198521319] [2020-10-23 21:54:03,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-10-23 21:54:03,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:03,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-10-23 21:54:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-10-23 21:54:03,680 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand 108 states. [2020-10-23 21:54:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:21,942 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2020-10-23 21:54:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-10-23 21:54:21,945 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 403 [2020-10-23 21:54:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:21,948 INFO L225 Difference]: With dead ends: 445 [2020-10-23 21:54:21,948 INFO L226 Difference]: Without dead ends: 418 [2020-10-23 21:54:21,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-10-23 21:54:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-23 21:54:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 413. [2020-10-23 21:54:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-23 21:54:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 415 transitions. [2020-10-23 21:54:22,055 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 415 transitions. Word has length 403 [2020-10-23 21:54:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:22,056 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 415 transitions. [2020-10-23 21:54:22,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-10-23 21:54:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 415 transitions. [2020-10-23 21:54:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-23 21:54:22,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:22,058 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:22,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-23 21:54:22,058 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1882923881, now seen corresponding path program 53 times [2020-10-23 21:54:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:22,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330059034] [2020-10-23 21:54:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:22,745 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:22,746 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:34,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:54:34,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330059034] [2020-10-23 21:54:34,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:34,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-10-23 21:54:34,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881741801] [2020-10-23 21:54:34,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-10-23 21:54:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:34,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-10-23 21:54:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-10-23 21:54:34,981 INFO L87 Difference]: Start difference. First operand 413 states and 415 transitions. Second operand 110 states. [2020-10-23 21:54:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:54,883 INFO L93 Difference]: Finished difference Result 452 states and 456 transitions. [2020-10-23 21:54:54,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-10-23 21:54:54,886 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 410 [2020-10-23 21:54:54,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:54,889 INFO L225 Difference]: With dead ends: 452 [2020-10-23 21:54:54,890 INFO L226 Difference]: Without dead ends: 425 [2020-10-23 21:54:54,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-10-23 21:54:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-23 21:54:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2020-10-23 21:54:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-23 21:54:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-10-23 21:54:55,024 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-10-23 21:54:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:55,024 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-10-23 21:54:55,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-10-23 21:54:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-10-23 21:54:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-10-23 21:54:55,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:55,027 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:55,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-23 21:54:55,027 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1852827193, now seen corresponding path program 54 times [2020-10-23 21:54:55,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:55,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863086601] [2020-10-23 21:54:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:55,835 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:55,837 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:55:08,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863086601] [2020-10-23 21:55:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-10-23 21:55:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243141529] [2020-10-23 21:55:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-10-23 21:55:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-10-23 21:55:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-10-23 21:55:08,623 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 112 states. [2020-10-23 21:55:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:30,353 INFO L93 Difference]: Finished difference Result 459 states and 463 transitions. [2020-10-23 21:55:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-23 21:55:30,355 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 417 [2020-10-23 21:55:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:30,358 INFO L225 Difference]: With dead ends: 459 [2020-10-23 21:55:30,359 INFO L226 Difference]: Without dead ends: 432 [2020-10-23 21:55:30,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-10-23 21:55:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-23 21:55:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2020-10-23 21:55:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-23 21:55:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 429 transitions. [2020-10-23 21:55:30,478 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 429 transitions. Word has length 417 [2020-10-23 21:55:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:30,478 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 429 transitions. [2020-10-23 21:55:30,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-10-23 21:55:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 429 transitions. [2020-10-23 21:55:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-23 21:55:30,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:30,480 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:55:30,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-23 21:55:30,481 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:30,481 INFO L82 PathProgramCache]: Analyzing trace with hash 659465879, now seen corresponding path program 55 times [2020-10-23 21:55:30,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:30,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33845369] [2020-10-23 21:55:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:31,270 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:31,271 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:45,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:55:45,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33845369] [2020-10-23 21:55:45,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:45,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-10-23 21:55:45,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058950474] [2020-10-23 21:55:45,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-10-23 21:55:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-10-23 21:55:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-10-23 21:55:45,661 INFO L87 Difference]: Start difference. First operand 427 states and 429 transitions. Second operand 114 states. [2020-10-23 21:56:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:08,170 INFO L93 Difference]: Finished difference Result 466 states and 470 transitions. [2020-10-23 21:56:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-10-23 21:56:08,173 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 424 [2020-10-23 21:56:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:08,175 INFO L225 Difference]: With dead ends: 466 [2020-10-23 21:56:08,176 INFO L226 Difference]: Without dead ends: 439 [2020-10-23 21:56:08,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-10-23 21:56:08,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-23 21:56:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2020-10-23 21:56:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-23 21:56:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 436 transitions. [2020-10-23 21:56:08,329 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 436 transitions. Word has length 424 [2020-10-23 21:56:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:08,329 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 436 transitions. [2020-10-23 21:56:08,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-10-23 21:56:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 436 transitions. [2020-10-23 21:56:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-23 21:56:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:08,331 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:56:08,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-23 21:56:08,332 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash -884011065, now seen corresponding path program 56 times [2020-10-23 21:56:08,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:08,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920067500] [2020-10-23 21:56:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:09,245 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:09,247 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:24,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:56:24,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920067500] [2020-10-23 21:56:24,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:24,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-10-23 21:56:24,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350746105] [2020-10-23 21:56:24,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-10-23 21:56:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-10-23 21:56:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-10-23 21:56:24,333 INFO L87 Difference]: Start difference. First operand 434 states and 436 transitions. Second operand 116 states. [2020-10-23 21:56:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:50,166 INFO L93 Difference]: Finished difference Result 473 states and 477 transitions. [2020-10-23 21:56:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-10-23 21:56:50,168 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 431 [2020-10-23 21:56:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:50,171 INFO L225 Difference]: With dead ends: 473 [2020-10-23 21:56:50,172 INFO L226 Difference]: Without dead ends: 446 [2020-10-23 21:56:50,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-10-23 21:56:50,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-23 21:56:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 441. [2020-10-23 21:56:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-23 21:56:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 443 transitions. [2020-10-23 21:56:50,322 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 443 transitions. Word has length 431 [2020-10-23 21:56:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:50,322 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 443 transitions. [2020-10-23 21:56:50,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-10-23 21:56:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 443 transitions. [2020-10-23 21:56:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-10-23 21:56:50,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:50,324 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:56:50,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-23 21:56:50,325 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2096033943, now seen corresponding path program 57 times [2020-10-23 21:56:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078290721] [2020-10-23 21:56:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:51,334 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:51,336 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:08,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:57:08,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078290721] [2020-10-23 21:57:08,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:08,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-10-23 21:57:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576080681] [2020-10-23 21:57:08,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-10-23 21:57:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-10-23 21:57:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-10-23 21:57:08,612 INFO L87 Difference]: Start difference. First operand 441 states and 443 transitions. Second operand 118 states. [2020-10-23 21:57:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:34,896 INFO L93 Difference]: Finished difference Result 480 states and 484 transitions. [2020-10-23 21:57:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-10-23 21:57:34,899 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 438 [2020-10-23 21:57:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:34,902 INFO L225 Difference]: With dead ends: 480 [2020-10-23 21:57:34,902 INFO L226 Difference]: Without dead ends: 453 [2020-10-23 21:57:34,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-10-23 21:57:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-23 21:57:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 448. [2020-10-23 21:57:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-23 21:57:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2020-10-23 21:57:35,058 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 438 [2020-10-23 21:57:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:35,059 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2020-10-23 21:57:35,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-10-23 21:57:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2020-10-23 21:57:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-23 21:57:35,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:35,061 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:35,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-23 21:57:35,061 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash -123238969, now seen corresponding path program 58 times [2020-10-23 21:57:35,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712539390] [2020-10-23 21:57:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:36,050 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:36,052 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:53,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:57:53,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712539390] [2020-10-23 21:57:53,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:53,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-10-23 21:57:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348018207] [2020-10-23 21:57:53,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-10-23 21:57:53,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-10-23 21:57:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 21:57:53,964 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand 120 states. [2020-10-23 21:58:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:23,555 INFO L93 Difference]: Finished difference Result 487 states and 491 transitions. [2020-10-23 21:58:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-10-23 21:58:23,559 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 445 [2020-10-23 21:58:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:23,562 INFO L225 Difference]: With dead ends: 487 [2020-10-23 21:58:23,562 INFO L226 Difference]: Without dead ends: 460 [2020-10-23 21:58:23,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-10-23 21:58:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-23 21:58:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2020-10-23 21:58:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-23 21:58:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 457 transitions. [2020-10-23 21:58:23,704 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 457 transitions. Word has length 445 [2020-10-23 21:58:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:23,704 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 457 transitions. [2020-10-23 21:58:23,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-10-23 21:58:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 457 transitions. [2020-10-23 21:58:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-23 21:58:23,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:23,708 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:23,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-23 21:58:23,708 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -414860649, now seen corresponding path program 59 times [2020-10-23 21:58:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:23,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673388382] [2020-10-23 21:58:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:24,653 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:58:24,654 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:43,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:58:43,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673388382] [2020-10-23 21:58:43,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:43,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-10-23 21:58:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031492380] [2020-10-23 21:58:43,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-10-23 21:58:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-10-23 21:58:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-10-23 21:58:43,538 INFO L87 Difference]: Start difference. First operand 455 states and 457 transitions. Second operand 122 states. [2020-10-23 21:59:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:59:14,061 INFO L93 Difference]: Finished difference Result 494 states and 498 transitions. [2020-10-23 21:59:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-10-23 21:59:14,064 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 452 [2020-10-23 21:59:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:59:14,068 INFO L225 Difference]: With dead ends: 494 [2020-10-23 21:59:14,068 INFO L226 Difference]: Without dead ends: 467 [2020-10-23 21:59:14,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-10-23 21:59:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-23 21:59:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 462. [2020-10-23 21:59:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-23 21:59:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 464 transitions. [2020-10-23 21:59:14,229 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 464 transitions. Word has length 452 [2020-10-23 21:59:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:59:14,229 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 464 transitions. [2020-10-23 21:59:14,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-10-23 21:59:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 464 transitions. [2020-10-23 21:59:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-23 21:59:14,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:59:14,231 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:59:14,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-23 21:59:14,231 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:59:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:59:14,231 INFO L82 PathProgramCache]: Analyzing trace with hash 251231175, now seen corresponding path program 60 times [2020-10-23 21:59:14,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:59:14,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580570276] [2020-10-23 21:59:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:59:15,219 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:59:15,221 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:59:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:34,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:59:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:59:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:59:34,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580570276] [2020-10-23 21:59:34,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:59:34,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-10-23 21:59:34,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314874036] [2020-10-23 21:59:34,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-10-23 21:59:34,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:59:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-10-23 21:59:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-10-23 21:59:34,532 INFO L87 Difference]: Start difference. First operand 462 states and 464 transitions. Second operand 124 states. [2020-10-23 22:00:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:04,537 INFO L93 Difference]: Finished difference Result 501 states and 505 transitions. [2020-10-23 22:00:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-10-23 22:00:04,540 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 459 [2020-10-23 22:00:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:04,543 INFO L225 Difference]: With dead ends: 501 [2020-10-23 22:00:04,543 INFO L226 Difference]: Without dead ends: 474 [2020-10-23 22:00:04,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-10-23 22:00:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-23 22:00:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 469. [2020-10-23 22:00:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-23 22:00:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 471 transitions. [2020-10-23 22:00:04,699 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 471 transitions. Word has length 459 [2020-10-23 22:00:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:04,699 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 471 transitions. [2020-10-23 22:00:04,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-10-23 22:00:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 471 transitions. [2020-10-23 22:00:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-10-23 22:00:04,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:04,702 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:04,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-23 22:00:04,702 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1527577449, now seen corresponding path program 61 times [2020-10-23 22:00:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:04,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719201171] [2020-10-23 22:00:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:05,546 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:00:05,547 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat