/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:46:01,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:46:01,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:46:01,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:46:01,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:46:01,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:46:01,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:46:01,677 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 21:46:01,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:46:01,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:46:01,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:46:01,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:46:01,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:46:01,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:46:01,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:46:01,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:46:01,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:46:01,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:46:01,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:46:01,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:46:01,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:46:01,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:46:01,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:46:01,709 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:46:01,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:46:01,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:46:01,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:46:01,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:46:01,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:46:01,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:46:01,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:46:02,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:46:02,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:46:02,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:46:02,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:46:02,176 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:46:02,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-10-23 21:46:02,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0a75ed5/9d2a286a835f421fa4ddef4459594bfd/FLAG00a8775e8 [2020-10-23 21:46:02,992 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:46:02,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-10-23 21:46:03,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0a75ed5/9d2a286a835f421fa4ddef4459594bfd/FLAG00a8775e8 [2020-10-23 21:46:03,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0a75ed5/9d2a286a835f421fa4ddef4459594bfd [2020-10-23 21:46:03,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:46:03,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:46:03,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:03,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:46:03,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:46:03,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3395589a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03, skipping insertion in model container [2020-10-23 21:46:03,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:46:03,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:46:03,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:03,569 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:46:03,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:03,612 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:46:03,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03 WrapperNode [2020-10-23 21:46:03,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:03,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:46:03,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:46:03,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:46:03,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (1/1) ... [2020-10-23 21:46:03,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:46:03,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:46:03,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:46:03,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:46:03,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (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 21:46:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:46:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:46:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:46:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:46:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:46:03,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:46:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:46:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:46:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:46:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:46:04,368 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:46:04,368 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-23 21:46:04,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:04 BoogieIcfgContainer [2020-10-23 21:46:04,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:46:04,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:46:04,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:46:04,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:46:04,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:46:03" (1/3) ... [2020-10-23 21:46:04,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f16696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:04, skipping insertion in model container [2020-10-23 21:46:04,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:03" (2/3) ... [2020-10-23 21:46:04,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f16696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:04, skipping insertion in model container [2020-10-23 21:46:04,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:04" (3/3) ... [2020-10-23 21:46:04,385 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-10-23 21:46:04,399 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:46:04,406 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:46:04,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:46:04,460 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:46:04,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:46:04,461 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:46:04,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:46:04,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:46:04,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:46:04,461 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:46:04,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:46:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-23 21:46:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 21:46:04,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:04,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:04,516 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1931188946, now seen corresponding path program 1 times [2020-10-23 21:46:04,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:04,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203747950] [2020-10-23 21:46:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:04,637 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:04,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:04,938 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 21:46:04,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203747950] [2020-10-23 21:46:04,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:04,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:46:04,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371141465] [2020-10-23 21:46:04,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:46:04,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:46:04,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:46:04,973 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-10-23 21:46:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:05,263 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-10-23 21:46:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:46:05,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-23 21:46:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:05,275 INFO L225 Difference]: With dead ends: 200 [2020-10-23 21:46:05,275 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 21:46:05,280 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 21:46:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 21:46:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-23 21:46:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 21:46:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-23 21:46:05,336 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2020-10-23 21:46:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:05,337 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-23 21:46:05,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:46:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-23 21:46:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 21:46:05,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:05,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:05,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:46:05,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1726206385, now seen corresponding path program 1 times [2020-10-23 21:46:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:05,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507840693] [2020-10-23 21:46:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:05,347 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,480 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 21:46:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507840693] [2020-10-23 21:46:05,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:05,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:46:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143010280] [2020-10-23 21:46:05,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:46:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:46:05,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:46:05,484 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 4 states. [2020-10-23 21:46:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:05,676 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-23 21:46:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:46:05,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-23 21:46:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:05,679 INFO L225 Difference]: With dead ends: 152 [2020-10-23 21:46:05,679 INFO L226 Difference]: Without dead ends: 95 [2020-10-23 21:46:05,681 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 21:46:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-23 21:46:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-10-23 21:46:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-23 21:46:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-23 21:46:05,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 47 [2020-10-23 21:46:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:05,695 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-23 21:46:05,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:46:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-23 21:46:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-23 21:46:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:05,698 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, 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 21:46:05,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:46:05,698 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 531359868, now seen corresponding path program 1 times [2020-10-23 21:46:05,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:05,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407523893] [2020-10-23 21:46:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:05,802 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:05,804 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:05,924 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 21:46:05,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407523893] [2020-10-23 21:46:05,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:05,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:46:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129980714] [2020-10-23 21:46:05,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:46:05,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:46:05,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:46:05,927 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 6 states. [2020-10-23 21:46:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:06,146 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-23 21:46:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:46:06,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-23 21:46:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:06,149 INFO L225 Difference]: With dead ends: 160 [2020-10-23 21:46:06,149 INFO L226 Difference]: Without dead ends: 102 [2020-10-23 21:46:06,150 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 21:46:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-23 21:46:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-10-23 21:46:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 21:46:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-23 21:46:06,164 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 61 [2020-10-23 21:46:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:06,179 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-23 21:46:06,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:46:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-23 21:46:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 21:46:06,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:06,183 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, 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 21:46:06,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:46:06,184 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2109050272, now seen corresponding path program 2 times [2020-10-23 21:46:06,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:06,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048932570] [2020-10-23 21:46:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:06,459 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:06,462 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:06,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:06,592 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 21:46:06,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048932570] [2020-10-23 21:46:06,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:06,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:46:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245100197] [2020-10-23 21:46:06,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:46:06,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:46:06,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:46:06,596 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 6 states. [2020-10-23 21:46:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:06,850 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-10-23 21:46:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:46:06,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-23 21:46:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:06,852 INFO L225 Difference]: With dead ends: 150 [2020-10-23 21:46:06,853 INFO L226 Difference]: Without dead ends: 104 [2020-10-23 21:46:06,854 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 21:46:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-23 21:46:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-23 21:46:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 21:46:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-23 21:46:06,868 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 68 [2020-10-23 21:46:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:06,868 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-23 21:46:06,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:46:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-23 21:46:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 21:46:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:06,870 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 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 21:46:06,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:46:06,871 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1042508207, now seen corresponding path program 3 times [2020-10-23 21:46:06,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:06,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932067032] [2020-10-23 21:46:06,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:07,330 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:07,331 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:07,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:07,443 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 21:46:07,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932067032] [2020-10-23 21:46:07,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:07,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:46:07,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313430921] [2020-10-23 21:46:07,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:46:07,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:46:07,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:46:07,446 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 8 states. [2020-10-23 21:46:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:07,768 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2020-10-23 21:46:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 21:46:07,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-23 21:46:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:07,771 INFO L225 Difference]: With dead ends: 176 [2020-10-23 21:46:07,772 INFO L226 Difference]: Without dead ends: 111 [2020-10-23 21:46:07,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-23 21:46:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-23 21:46:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-23 21:46:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-10-23 21:46:07,785 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 75 [2020-10-23 21:46:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:07,786 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-10-23 21:46:07,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:46:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-10-23 21:46:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 21:46:07,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:07,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:07,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:46:07,789 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1786539125, now seen corresponding path program 4 times [2020-10-23 21:46:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:07,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703019318] [2020-10-23 21:46:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:08,293 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:08,295 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:08,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:08,482 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 21:46:08,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703019318] [2020-10-23 21:46:08,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:08,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:46:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348907791] [2020-10-23 21:46:08,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:46:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:46:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:46:08,485 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 10 states. [2020-10-23 21:46:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:08,869 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2020-10-23 21:46:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:46:08,870 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-10-23 21:46:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:08,871 INFO L225 Difference]: With dead ends: 183 [2020-10-23 21:46:08,872 INFO L226 Difference]: Without dead ends: 118 [2020-10-23 21:46:08,873 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 21:46:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-23 21:46:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-10-23 21:46:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 21:46:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-23 21:46:08,891 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 82 [2020-10-23 21:46:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:08,894 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-23 21:46:08,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:46:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-23 21:46:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 21:46:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:08,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:08,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:46:08,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2016028113, now seen corresponding path program 5 times [2020-10-23 21:46:08,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90173917] [2020-10-23 21:46:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:09,377 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:09,379 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:09,591 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 21:46:09,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90173917] [2020-10-23 21:46:09,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:09,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:46:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059155570] [2020-10-23 21:46:09,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:46:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:46:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:09,595 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 12 states. [2020-10-23 21:46:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:10,027 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-10-23 21:46:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 21:46:10,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-23 21:46:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:10,031 INFO L225 Difference]: With dead ends: 185 [2020-10-23 21:46:10,031 INFO L226 Difference]: Without dead ends: 120 [2020-10-23 21:46:10,033 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 21:46:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-23 21:46:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-23 21:46:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 21:46:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-23 21:46:10,048 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 89 [2020-10-23 21:46:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:10,049 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-23 21:46:10,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:46:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-23 21:46:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-23 21:46:10,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:10,051 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:10,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:46:10,052 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 741764341, now seen corresponding path program 6 times [2020-10-23 21:46:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:10,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872482753] [2020-10-23 21:46:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:10,528 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:10,530 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:10,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:10,642 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 21:46:10,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872482753] [2020-10-23 21:46:10,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:10,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:46:10,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219022876] [2020-10-23 21:46:10,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:46:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:46:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:46:10,645 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 8 states. [2020-10-23 21:46:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:10,933 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-10-23 21:46:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 21:46:10,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-23 21:46:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:10,937 INFO L225 Difference]: With dead ends: 178 [2020-10-23 21:46:10,937 INFO L226 Difference]: Without dead ends: 132 [2020-10-23 21:46:10,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-23 21:46:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-10-23 21:46:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-23 21:46:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-10-23 21:46:10,951 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 96 [2020-10-23 21:46:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:10,952 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-10-23 21:46:10,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:46:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-10-23 21:46:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-23 21:46:10,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:10,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:10,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:46:10,954 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1731640668, now seen corresponding path program 7 times [2020-10-23 21:46:10,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:10,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944349360] [2020-10-23 21:46:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:11,402 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:11,405 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:11,550 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 21:46:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944349360] [2020-10-23 21:46:11,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:11,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:46:11,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57000028] [2020-10-23 21:46:11,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:46:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:11,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:46:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:46:11,553 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 10 states. [2020-10-23 21:46:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:11,907 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2020-10-23 21:46:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:46:11,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-10-23 21:46:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:11,909 INFO L225 Difference]: With dead ends: 185 [2020-10-23 21:46:11,909 INFO L226 Difference]: Without dead ends: 139 [2020-10-23 21:46:11,910 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 21:46:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-23 21:46:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-10-23 21:46:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-23 21:46:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2020-10-23 21:46:11,923 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 103 [2020-10-23 21:46:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2020-10-23 21:46:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:46:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2020-10-23 21:46:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-23 21:46:11,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:11,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:11,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:46:11,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash -170558699, now seen corresponding path program 8 times [2020-10-23 21:46:11,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:11,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752034753] [2020-10-23 21:46:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:12,379 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:12,381 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:12,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:12,639 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 21:46:12,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752034753] [2020-10-23 21:46:12,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:46:12,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284011374] [2020-10-23 21:46:12,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:46:12,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:12,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:46:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:12,644 INFO L87 Difference]: Start difference. First operand 134 states and 139 transitions. Second operand 12 states. [2020-10-23 21:46:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:13,185 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2020-10-23 21:46:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 21:46:13,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-10-23 21:46:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:13,189 INFO L225 Difference]: With dead ends: 187 [2020-10-23 21:46:13,189 INFO L226 Difference]: Without dead ends: 141 [2020-10-23 21:46:13,191 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 21:46:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-23 21:46:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-23 21:46:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-23 21:46:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-23 21:46:13,210 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 110 [2020-10-23 21:46:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:13,212 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-23 21:46:13,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:46:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-23 21:46:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 21:46:13,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:13,220 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:13,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:46:13,220 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1454273732, now seen corresponding path program 9 times [2020-10-23 21:46:13,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:13,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927660051] [2020-10-23 21:46:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:13,671 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:13,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:13,881 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 21:46:13,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927660051] [2020-10-23 21:46:13,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:13,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:46:13,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794323727] [2020-10-23 21:46:13,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:46:13,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:46:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:46:13,884 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 8 states. [2020-10-23 21:46:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:14,191 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-23 21:46:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:46:14,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-23 21:46:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:14,194 INFO L225 Difference]: With dead ends: 179 [2020-10-23 21:46:14,194 INFO L226 Difference]: Without dead ends: 146 [2020-10-23 21:46:14,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:46:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-23 21:46:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-23 21:46:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 21:46:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-10-23 21:46:14,206 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 117 [2020-10-23 21:46:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:14,206 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-10-23 21:46:14,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:46:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-10-23 21:46:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 21:46:14,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:14,209 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:14,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:46:14,209 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash -799740924, now seen corresponding path program 1 times [2020-10-23 21:46:14,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:14,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090994192] [2020-10-23 21:46:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:14,670 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:14,672 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:14,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:14,863 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 21:46:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090994192] [2020-10-23 21:46:14,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:14,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:46:14,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779399932] [2020-10-23 21:46:14,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:46:14,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:14,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:46:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:46:14,868 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 10 states. [2020-10-23 21:46:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:15,340 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-10-23 21:46:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:46:15,341 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-10-23 21:46:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:15,349 INFO L225 Difference]: With dead ends: 183 [2020-10-23 21:46:15,349 INFO L226 Difference]: Without dead ends: 175 [2020-10-23 21:46:15,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:46:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-23 21:46:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-10-23 21:46:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-23 21:46:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-23 21:46:15,369 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 123 [2020-10-23 21:46:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:15,370 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-23 21:46:15,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:46:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-23 21:46:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 21:46:15,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:15,372 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:15,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:46:15,373 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash 321820364, now seen corresponding path program 2 times [2020-10-23 21:46:15,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:15,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703668543] [2020-10-23 21:46:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:15,908 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:15,909 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:16,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:16,088 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 21:46:16,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703668543] [2020-10-23 21:46:16,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:16,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:46:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211149072] [2020-10-23 21:46:16,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:46:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:46:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:16,091 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 12 states. [2020-10-23 21:46:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:16,694 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-10-23 21:46:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 21:46:16,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-10-23 21:46:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:16,696 INFO L225 Difference]: With dead ends: 184 [2020-10-23 21:46:16,696 INFO L226 Difference]: Without dead ends: 176 [2020-10-23 21:46:16,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:46:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-23 21:46:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2020-10-23 21:46:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 21:46:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-23 21:46:16,710 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2020-10-23 21:46:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:16,711 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-23 21:46:16,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:46:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-23 21:46:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 21:46:16,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:16,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1] [2020-10-23 21:46:16,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:46:16,714 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1541151436, now seen corresponding path program 1 times [2020-10-23 21:46:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:16,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739433729] [2020-10-23 21:46:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:17,236 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:17,239 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:17,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:17,384 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 21:46:17,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739433729] [2020-10-23 21:46:17,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:17,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:46:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317488942] [2020-10-23 21:46:17,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:46:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:46:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:46:17,387 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 6 states. [2020-10-23 21:46:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:17,577 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2020-10-23 21:46:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:46:17,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-10-23 21:46:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:17,579 INFO L225 Difference]: With dead ends: 189 [2020-10-23 21:46:17,579 INFO L226 Difference]: Without dead ends: 149 [2020-10-23 21:46:17,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:46:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-23 21:46:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-23 21:46:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-23 21:46:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-10-23 21:46:17,595 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 135 [2020-10-23 21:46:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:17,596 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-10-23 21:46:17,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:46:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-10-23 21:46:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-23 21:46:17,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:17,598 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1] [2020-10-23 21:46:17,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:46:17,598 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash -307444684, now seen corresponding path program 1 times [2020-10-23 21:46:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:17,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653210242] [2020-10-23 21:46:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:18,194 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:18,196 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:18,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:18,417 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 21:46:18,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653210242] [2020-10-23 21:46:18,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:18,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:46:18,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362867425] [2020-10-23 21:46:18,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:46:18,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:46:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:46:18,420 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 12 states. [2020-10-23 21:46:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:18,933 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-10-23 21:46:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 21:46:18,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-10-23 21:46:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:18,935 INFO L225 Difference]: With dead ends: 205 [2020-10-23 21:46:18,936 INFO L226 Difference]: Without dead ends: 155 [2020-10-23 21:46:18,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:46:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-23 21:46:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-23 21:46:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-23 21:46:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-10-23 21:46:18,955 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 141 [2020-10-23 21:46:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:18,956 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-10-23 21:46:18,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:46:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-10-23 21:46:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-23 21:46:18,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:18,958 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:18,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:46:18,958 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash -363211524, now seen corresponding path program 2 times [2020-10-23 21:46:18,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:18,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611974328] [2020-10-23 21:46:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:19,652 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:19,654 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:19,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:19,933 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 21:46:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611974328] [2020-10-23 21:46:19,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:19,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 21:46:19,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807450522] [2020-10-23 21:46:19,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 21:46:19,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 21:46:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:46:19,937 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 14 states. [2020-10-23 21:46:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:20,525 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2020-10-23 21:46:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 21:46:20,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 147 [2020-10-23 21:46:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:20,527 INFO L225 Difference]: With dead ends: 179 [2020-10-23 21:46:20,527 INFO L226 Difference]: Without dead ends: 171 [2020-10-23 21:46:20,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:46:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-23 21:46:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-10-23 21:46:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-23 21:46:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-10-23 21:46:20,543 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 147 [2020-10-23 21:46:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:20,543 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-10-23 21:46:20,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 21:46:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-10-23 21:46:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-23 21:46:20,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:20,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 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, 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 21:46:20,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:46:20,546 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1555255236, now seen corresponding path program 3 times [2020-10-23 21:46:20,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:20,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734992521] [2020-10-23 21:46:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:21,749 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:21,751 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:21,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:21,921 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 21:46:21,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734992521] [2020-10-23 21:46:21,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:21,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:46:21,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362947417] [2020-10-23 21:46:21,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:46:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:46:21,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:46:21,924 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 10 states. [2020-10-23 21:46:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:22,283 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-10-23 21:46:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 21:46:22,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 159 [2020-10-23 21:46:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:22,286 INFO L225 Difference]: With dead ends: 248 [2020-10-23 21:46:22,286 INFO L226 Difference]: Without dead ends: 173 [2020-10-23 21:46:22,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-23 21:46:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-23 21:46:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-10-23 21:46:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-23 21:46:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-10-23 21:46:22,301 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 159 [2020-10-23 21:46:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:22,302 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-10-23 21:46:22,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:46:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-10-23 21:46:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 21:46:22,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:22,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:22,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:46:22,305 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 351813932, now seen corresponding path program 4 times [2020-10-23 21:46:22,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:22,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500638669] [2020-10-23 21:46:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:23,582 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:23,584 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:23,831 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 21:46:23,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500638669] [2020-10-23 21:46:23,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:23,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 21:46:23,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426998162] [2020-10-23 21:46:23,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 21:46:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 21:46:23,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:46:23,841 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 16 states. [2020-10-23 21:46:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:24,547 INFO L93 Difference]: Finished difference Result 257 states and 269 transitions. [2020-10-23 21:46:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 21:46:24,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 165 [2020-10-23 21:46:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:24,550 INFO L225 Difference]: With dead ends: 257 [2020-10-23 21:46:24,550 INFO L226 Difference]: Without dead ends: 179 [2020-10-23 21:46:24,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:46:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-23 21:46:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-10-23 21:46:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-23 21:46:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-10-23 21:46:24,566 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 165 [2020-10-23 21:46:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:24,567 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-10-23 21:46:24,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 21:46:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-10-23 21:46:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-23 21:46:24,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:24,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:24,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 21:46:24,569 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1810694644, now seen corresponding path program 5 times [2020-10-23 21:46:24,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:24,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346263110] [2020-10-23 21:46:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:25,820 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:25,822 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:26,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:26,147 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 21:46:26,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346263110] [2020-10-23 21:46:26,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:26,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 21:46:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500856152] [2020-10-23 21:46:26,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 21:46:26,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 21:46:26,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:46:26,150 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 18 states. [2020-10-23 21:46:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:27,038 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2020-10-23 21:46:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 21:46:27,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 171 [2020-10-23 21:46:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:27,045 INFO L225 Difference]: With dead ends: 207 [2020-10-23 21:46:27,045 INFO L226 Difference]: Without dead ends: 199 [2020-10-23 21:46:27,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 21:46:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-23 21:46:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2020-10-23 21:46:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-23 21:46:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-10-23 21:46:27,078 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 171 [2020-10-23 21:46:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:27,079 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-10-23 21:46:27,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 21:46:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-10-23 21:46:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-23 21:46:27,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:27,085 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:27,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 21:46:27,085 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1378694980, now seen corresponding path program 6 times [2020-10-23 21:46:27,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:27,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064227792] [2020-10-23 21:46:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:28,376 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:28,377 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:28,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:28,594 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 21:46:28,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064227792] [2020-10-23 21:46:28,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:28,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 21:46:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852996897] [2020-10-23 21:46:28,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 21:46:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 21:46:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:46:28,597 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 14 states. [2020-10-23 21:46:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:29,356 INFO L93 Difference]: Finished difference Result 369 states and 388 transitions. [2020-10-23 21:46:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 21:46:29,357 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 183 [2020-10-23 21:46:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:29,359 INFO L225 Difference]: With dead ends: 369 [2020-10-23 21:46:29,359 INFO L226 Difference]: Without dead ends: 289 [2020-10-23 21:46:29,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:46:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-23 21:46:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2020-10-23 21:46:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-23 21:46:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2020-10-23 21:46:29,383 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 183 [2020-10-23 21:46:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:29,384 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2020-10-23 21:46:29,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 21:46:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2020-10-23 21:46:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-23 21:46:29,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:29,387 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:29,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 21:46:29,388 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:29,388 INFO L82 PathProgramCache]: Analyzing trace with hash 104071716, now seen corresponding path program 7 times [2020-10-23 21:46:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:29,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458211100] [2020-10-23 21:46:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:30,672 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:30,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:31,060 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 21:46:31,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458211100] [2020-10-23 21:46:31,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:31,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 21:46:31,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799000348] [2020-10-23 21:46:31,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 21:46:31,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:31,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 21:46:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:46:31,063 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand 20 states. [2020-10-23 21:46:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:32,091 INFO L93 Difference]: Finished difference Result 380 states and 398 transitions. [2020-10-23 21:46:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 21:46:32,092 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-10-23 21:46:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:32,094 INFO L225 Difference]: With dead ends: 380 [2020-10-23 21:46:32,095 INFO L226 Difference]: Without dead ends: 254 [2020-10-23 21:46:32,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 21:46:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-23 21:46:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2020-10-23 21:46:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-23 21:46:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2020-10-23 21:46:32,116 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 189 [2020-10-23 21:46:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:32,116 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2020-10-23 21:46:32,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 21:46:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2020-10-23 21:46:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-23 21:46:32,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:32,118 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:32,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 21:46:32,119 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1299287316, now seen corresponding path program 8 times [2020-10-23 21:46:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876905524] [2020-10-23 21:46:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:33,389 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:33,391 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:33,815 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 21:46:33,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876905524] [2020-10-23 21:46:33,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:33,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 21:46:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975266035] [2020-10-23 21:46:33,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 21:46:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 21:46:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-23 21:46:33,818 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand 22 states. [2020-10-23 21:46:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:35,006 INFO L93 Difference]: Finished difference Result 286 states and 296 transitions. [2020-10-23 21:46:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 21:46:35,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-10-23 21:46:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:35,012 INFO L225 Difference]: With dead ends: 286 [2020-10-23 21:46:35,012 INFO L226 Difference]: Without dead ends: 278 [2020-10-23 21:46:35,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:46:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-23 21:46:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 260. [2020-10-23 21:46:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-23 21:46:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 270 transitions. [2020-10-23 21:46:35,043 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 270 transitions. Word has length 195 [2020-10-23 21:46:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:35,044 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 270 transitions. [2020-10-23 21:46:35,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 21:46:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 270 transitions. [2020-10-23 21:46:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-23 21:46:35,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:35,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:35,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 21:46:35,046 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1824163252, now seen corresponding path program 9 times [2020-10-23 21:46:35,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:35,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154774295] [2020-10-23 21:46:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:36,240 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:36,242 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:36,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:36,569 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 21:46:36,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154774295] [2020-10-23 21:46:36,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:36,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 21:46:36,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074223442] [2020-10-23 21:46:36,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 21:46:36,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 21:46:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:46:36,572 INFO L87 Difference]: Start difference. First operand 260 states and 270 transitions. Second operand 18 states. [2020-10-23 21:46:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:37,980 INFO L93 Difference]: Finished difference Result 577 states and 609 transitions. [2020-10-23 21:46:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 21:46:37,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 207 [2020-10-23 21:46:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:37,985 INFO L225 Difference]: With dead ends: 577 [2020-10-23 21:46:37,985 INFO L226 Difference]: Without dead ends: 476 [2020-10-23 21:46:37,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:46:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-23 21:46:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 318. [2020-10-23 21:46:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-23 21:46:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-10-23 21:46:38,018 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 207 [2020-10-23 21:46:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:38,019 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-10-23 21:46:38,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 21:46:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-10-23 21:46:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-23 21:46:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:38,021 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:38,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 21:46:38,022 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1725957916, now seen corresponding path program 10 times [2020-10-23 21:46:38,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:38,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126941073] [2020-10-23 21:46:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:39,318 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:39,319 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:39,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:39,781 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 21:46:39,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126941073] [2020-10-23 21:46:39,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:39,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 21:46:39,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346670193] [2020-10-23 21:46:39,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 21:46:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 21:46:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:46:39,783 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 24 states. [2020-10-23 21:46:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:41,226 INFO L93 Difference]: Finished difference Result 535 states and 563 transitions. [2020-10-23 21:46:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-23 21:46:41,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 213 [2020-10-23 21:46:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:41,230 INFO L225 Difference]: With dead ends: 535 [2020-10-23 21:46:41,230 INFO L226 Difference]: Without dead ends: 345 [2020-10-23 21:46:41,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:46:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-23 21:46:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 336. [2020-10-23 21:46:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-23 21:46:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 350 transitions. [2020-10-23 21:46:41,264 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 350 transitions. Word has length 213 [2020-10-23 21:46:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:41,265 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 350 transitions. [2020-10-23 21:46:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 21:46:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 350 transitions. [2020-10-23 21:46:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-23 21:46:41,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:41,268 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:41,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 21:46:41,268 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 977151972, now seen corresponding path program 11 times [2020-10-23 21:46:41,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:41,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889241405] [2020-10-23 21:46:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:42,598 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:42,600 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:43,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:43,155 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 21:46:43,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889241405] [2020-10-23 21:46:43,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:43,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 21:46:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165340849] [2020-10-23 21:46:43,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 21:46:43,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:43,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 21:46:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-23 21:46:43,157 INFO L87 Difference]: Start difference. First operand 336 states and 350 transitions. Second operand 26 states. [2020-10-23 21:46:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:44,737 INFO L93 Difference]: Finished difference Result 393 states and 408 transitions. [2020-10-23 21:46:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 21:46:44,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-10-23 21:46:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:44,741 INFO L225 Difference]: With dead ends: 393 [2020-10-23 21:46:44,741 INFO L226 Difference]: Without dead ends: 385 [2020-10-23 21:46:44,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 21:46:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-23 21:46:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 348. [2020-10-23 21:46:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-23 21:46:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 363 transitions. [2020-10-23 21:46:44,780 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 363 transitions. Word has length 219 [2020-10-23 21:46:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:44,780 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 363 transitions. [2020-10-23 21:46:44,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 21:46:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 363 transitions. [2020-10-23 21:46:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-23 21:46:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:44,783 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:44,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 21:46:44,783 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:44,784 INFO L82 PathProgramCache]: Analyzing trace with hash 359302828, now seen corresponding path program 12 times [2020-10-23 21:46:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366834120] [2020-10-23 21:46:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:46,126 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:46,127 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:46,630 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 21:46:46,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366834120] [2020-10-23 21:46:46,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:46,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 21:46:46,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922151189] [2020-10-23 21:46:46,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 21:46:46,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 21:46:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-23 21:46:46,633 INFO L87 Difference]: Start difference. First operand 348 states and 363 transitions. Second operand 22 states. [2020-10-23 21:46:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:49,026 INFO L93 Difference]: Finished difference Result 863 states and 913 transitions. [2020-10-23 21:46:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 21:46:49,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2020-10-23 21:46:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:49,031 INFO L225 Difference]: With dead ends: 863 [2020-10-23 21:46:49,031 INFO L226 Difference]: Without dead ends: 741 [2020-10-23 21:46:49,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2020-10-23 21:46:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-10-23 21:46:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 412. [2020-10-23 21:46:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-23 21:46:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 431 transitions. [2020-10-23 21:46:49,094 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 431 transitions. Word has length 231 [2020-10-23 21:46:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:49,095 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 431 transitions. [2020-10-23 21:46:49,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 21:46:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 431 transitions. [2020-10-23 21:46:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-23 21:46:49,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:49,098 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 21:46:49,098 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 989614100, now seen corresponding path program 13 times [2020-10-23 21:46:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:49,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634466020] [2020-10-23 21:46:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:50,502 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:50,504 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:54,621 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 21:46:54,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634466020] [2020-10-23 21:46:54,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:54,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 21:46:54,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536698304] [2020-10-23 21:46:54,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 21:46:54,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 21:46:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 21:46:54,629 INFO L87 Difference]: Start difference. First operand 412 states and 431 transitions. Second operand 46 states. [2020-10-23 21:47:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:05,777 INFO L93 Difference]: Finished difference Result 849 states and 901 transitions. [2020-10-23 21:47:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 21:47:05,778 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 237 [2020-10-23 21:47:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:05,784 INFO L225 Difference]: With dead ends: 849 [2020-10-23 21:47:05,784 INFO L226 Difference]: Without dead ends: 776 [2020-10-23 21:47:05,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=753, Invalid=10803, Unknown=0, NotChecked=0, Total=11556 [2020-10-23 21:47:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-10-23 21:47:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 428. [2020-10-23 21:47:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-23 21:47:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 449 transitions. [2020-10-23 21:47:05,886 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 449 transitions. Word has length 237 [2020-10-23 21:47:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:05,887 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 449 transitions. [2020-10-23 21:47:05,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 21:47:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 449 transitions. [2020-10-23 21:47:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-23 21:47:05,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:05,890 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:05,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 21:47:05,890 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1517921228, now seen corresponding path program 1 times [2020-10-23 21:47:05,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:05,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099152402] [2020-10-23 21:47:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:08,365 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:08,367 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:08,964 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 21:47:08,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099152402] [2020-10-23 21:47:08,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-23 21:47:08,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429647462] [2020-10-23 21:47:08,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 21:47:08,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:08,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 21:47:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-23 21:47:08,966 INFO L87 Difference]: Start difference. First operand 428 states and 449 transitions. Second operand 23 states. [2020-10-23 21:47:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:10,213 INFO L93 Difference]: Finished difference Result 539 states and 566 transitions. [2020-10-23 21:47:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 21:47:10,214 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-10-23 21:47:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:10,217 INFO L225 Difference]: With dead ends: 539 [2020-10-23 21:47:10,218 INFO L226 Difference]: Without dead ends: 390 [2020-10-23 21:47:10,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:47:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-23 21:47:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-10-23 21:47:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-23 21:47:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 409 transitions. [2020-10-23 21:47:10,285 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 409 transitions. Word has length 239 [2020-10-23 21:47:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:10,286 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 409 transitions. [2020-10-23 21:47:10,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 21:47:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 409 transitions. [2020-10-23 21:47:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-23 21:47:10,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:10,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:10,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 21:47:10,289 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1593033316, now seen corresponding path program 2 times [2020-10-23 21:47:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:10,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847060689] [2020-10-23 21:47:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:12,775 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:12,776 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,453 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 21:47:13,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847060689] [2020-10-23 21:47:13,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:13,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-10-23 21:47:13,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986290077] [2020-10-23 21:47:13,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 21:47:13,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:13,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 21:47:13,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-23 21:47:13,456 INFO L87 Difference]: Start difference. First operand 390 states and 409 transitions. Second operand 25 states. [2020-10-23 21:47:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:15,602 INFO L93 Difference]: Finished difference Result 639 states and 674 transitions. [2020-10-23 21:47:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 21:47:15,603 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-10-23 21:47:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:15,606 INFO L225 Difference]: With dead ends: 639 [2020-10-23 21:47:15,607 INFO L226 Difference]: Without dead ends: 492 [2020-10-23 21:47:15,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:47:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-23 21:47:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 402. [2020-10-23 21:47:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-23 21:47:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 421 transitions. [2020-10-23 21:47:15,695 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 421 transitions. Word has length 245 [2020-10-23 21:47:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:15,696 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 421 transitions. [2020-10-23 21:47:15,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 21:47:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 421 transitions. [2020-10-23 21:47:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-23 21:47:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:15,699 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:15,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 21:47:15,699 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:15,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1763846052, now seen corresponding path program 3 times [2020-10-23 21:47:15,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:15,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140643508] [2020-10-23 21:47:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:17,396 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:17,398 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:18,042 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 21:47:18,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140643508] [2020-10-23 21:47:18,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:18,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-10-23 21:47:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515805157] [2020-10-23 21:47:18,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 21:47:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 21:47:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-23 21:47:18,045 INFO L87 Difference]: Start difference. First operand 402 states and 421 transitions. Second operand 25 states. [2020-10-23 21:47:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:21,594 INFO L93 Difference]: Finished difference Result 1019 states and 1079 transitions. [2020-10-23 21:47:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-23 21:47:21,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-10-23 21:47:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:21,601 INFO L225 Difference]: With dead ends: 1019 [2020-10-23 21:47:21,601 INFO L226 Difference]: Without dead ends: 897 [2020-10-23 21:47:21,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1070, Invalid=6070, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 21:47:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-10-23 21:47:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 454. [2020-10-23 21:47:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-23 21:47:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 476 transitions. [2020-10-23 21:47:21,702 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 476 transitions. Word has length 245 [2020-10-23 21:47:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:21,703 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 476 transitions. [2020-10-23 21:47:21,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 21:47:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 476 transitions. [2020-10-23 21:47:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-23 21:47:21,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:21,705 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:21,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 21:47:21,706 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash -59936508, now seen corresponding path program 4 times [2020-10-23 21:47:21,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:21,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544192200] [2020-10-23 21:47:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:24,299 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:24,301 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:25,152 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 21:47:25,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544192200] [2020-10-23 21:47:25,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:25,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-10-23 21:47:25,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516642685] [2020-10-23 21:47:25,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 21:47:25,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:25,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 21:47:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:47:25,156 INFO L87 Difference]: Start difference. First operand 454 states and 476 transitions. Second operand 27 states. [2020-10-23 21:47:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:29,111 INFO L93 Difference]: Finished difference Result 876 states and 926 transitions. [2020-10-23 21:47:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-23 21:47:29,116 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-10-23 21:47:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:29,120 INFO L225 Difference]: With dead ends: 876 [2020-10-23 21:47:29,121 INFO L226 Difference]: Without dead ends: 763 [2020-10-23 21:47:29,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=901, Invalid=5741, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 21:47:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-10-23 21:47:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 510. [2020-10-23 21:47:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-23 21:47:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 536 transitions. [2020-10-23 21:47:29,292 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 536 transitions. Word has length 251 [2020-10-23 21:47:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:29,293 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 536 transitions. [2020-10-23 21:47:29,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 21:47:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 536 transitions. [2020-10-23 21:47:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-23 21:47:29,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:29,297 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:29,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 21:47:29,298 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash -998024436, now seen corresponding path program 5 times [2020-10-23 21:47:29,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:29,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54975679] [2020-10-23 21:47:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:31,129 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:31,131 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,891 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 21:47:31,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54975679] [2020-10-23 21:47:31,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:31,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-10-23 21:47:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523707134] [2020-10-23 21:47:31,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 21:47:31,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 21:47:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-10-23 21:47:31,893 INFO L87 Difference]: Start difference. First operand 510 states and 536 transitions. Second operand 27 states. [2020-10-23 21:47:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:35,348 INFO L93 Difference]: Finished difference Result 943 states and 1001 transitions. [2020-10-23 21:47:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-23 21:47:35,349 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-10-23 21:47:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:35,352 INFO L225 Difference]: With dead ends: 943 [2020-10-23 21:47:35,352 INFO L226 Difference]: Without dead ends: 814 [2020-10-23 21:47:35,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1406, Invalid=5566, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 21:47:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-10-23 21:47:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 516. [2020-10-23 21:47:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-23 21:47:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 542 transitions. [2020-10-23 21:47:35,493 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 542 transitions. Word has length 251 [2020-10-23 21:47:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:35,494 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 542 transitions. [2020-10-23 21:47:35,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 21:47:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 542 transitions. [2020-10-23 21:47:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-23 21:47:35,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:35,497 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:35,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 21:47:35,497 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:35,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1573214308, now seen corresponding path program 6 times [2020-10-23 21:47:35,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102713507] [2020-10-23 21:47:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:38,234 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:38,236 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:38,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:39,041 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 21:47:39,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102713507] [2020-10-23 21:47:39,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:39,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 21:47:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670908152] [2020-10-23 21:47:39,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 21:47:39,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 21:47:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:39,043 INFO L87 Difference]: Start difference. First operand 516 states and 542 transitions. Second operand 28 states. [2020-10-23 21:47:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:41,943 INFO L93 Difference]: Finished difference Result 660 states and 694 transitions. [2020-10-23 21:47:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 21:47:41,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 257 [2020-10-23 21:47:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:41,947 INFO L225 Difference]: With dead ends: 660 [2020-10-23 21:47:41,948 INFO L226 Difference]: Without dead ends: 466 [2020-10-23 21:47:41,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 21:47:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-23 21:47:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-10-23 21:47:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-23 21:47:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 490 transitions. [2020-10-23 21:47:42,096 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 490 transitions. Word has length 257 [2020-10-23 21:47:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:42,097 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 490 transitions. [2020-10-23 21:47:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 21:47:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 490 transitions. [2020-10-23 21:47:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-23 21:47:42,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:42,100 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:42,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 21:47:42,100 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash -429623700, now seen corresponding path program 7 times [2020-10-23 21:47:42,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:42,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178634082] [2020-10-23 21:47:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:44,857 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:44,859 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:45,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:45,759 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 21:47:45,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178634082] [2020-10-23 21:47:45,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:45,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-10-23 21:47:45,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440087476] [2020-10-23 21:47:45,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 21:47:45,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 21:47:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:47:45,762 INFO L87 Difference]: Start difference. First operand 466 states and 490 transitions. Second operand 29 states. [2020-10-23 21:47:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:51,827 INFO L93 Difference]: Finished difference Result 1031 states and 1090 transitions. [2020-10-23 21:47:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-23 21:47:51,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 257 [2020-10-23 21:47:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:51,833 INFO L225 Difference]: With dead ends: 1031 [2020-10-23 21:47:51,833 INFO L226 Difference]: Without dead ends: 909 [2020-10-23 21:47:51,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1825, Invalid=11515, Unknown=0, NotChecked=0, Total=13340 [2020-10-23 21:47:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-23 21:47:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 514. [2020-10-23 21:47:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-23 21:47:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 541 transitions. [2020-10-23 21:47:52,013 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 541 transitions. Word has length 257 [2020-10-23 21:47:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:52,014 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 541 transitions. [2020-10-23 21:47:52,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 21:47:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 541 transitions. [2020-10-23 21:47:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-23 21:47:52,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:52,016 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:52,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 21:47:52,017 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash -700467756, now seen corresponding path program 8 times [2020-10-23 21:47:52,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:52,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199875953] [2020-10-23 21:47:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:53,944 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:53,946 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:54,938 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 21:47:54,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199875953] [2020-10-23 21:47:54,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:54,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-10-23 21:47:54,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356592018] [2020-10-23 21:47:54,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 21:47:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 21:47:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:47:54,941 INFO L87 Difference]: Start difference. First operand 514 states and 541 transitions. Second operand 31 states. [2020-10-23 21:47:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:58,691 INFO L93 Difference]: Finished difference Result 751 states and 794 transitions. [2020-10-23 21:47:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-23 21:47:58,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 257 [2020-10-23 21:47:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:58,697 INFO L225 Difference]: With dead ends: 751 [2020-10-23 21:47:58,697 INFO L226 Difference]: Without dead ends: 743 [2020-10-23 21:47:58,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=920, Invalid=4192, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 21:47:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-10-23 21:47:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2020-10-23 21:47:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-23 21:47:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 663 transitions. [2020-10-23 21:47:58,975 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 663 transitions. Word has length 257 [2020-10-23 21:47:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:58,976 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 663 transitions. [2020-10-23 21:47:58,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 21:47:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 663 transitions. [2020-10-23 21:47:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-23 21:47:58,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:58,979 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:58,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 21:47:58,979 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1356025908, now seen corresponding path program 9 times [2020-10-23 21:47:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:58,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530759278] [2020-10-23 21:47:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:01,888 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:01,890 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:02,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:03,050 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 21:48:03,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530759278] [2020-10-23 21:48:03,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:03,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 21:48:03,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400320760] [2020-10-23 21:48:03,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 21:48:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 21:48:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-10-23 21:48:03,053 INFO L87 Difference]: Start difference. First operand 627 states and 663 transitions. Second operand 30 states. [2020-10-23 21:48:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:07,559 INFO L93 Difference]: Finished difference Result 935 states and 987 transitions. [2020-10-23 21:48:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 21:48:07,560 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-23 21:48:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:07,564 INFO L225 Difference]: With dead ends: 935 [2020-10-23 21:48:07,564 INFO L226 Difference]: Without dead ends: 533 [2020-10-23 21:48:07,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2020-10-23 21:48:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-23 21:48:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2020-10-23 21:48:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-23 21:48:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 563 transitions. [2020-10-23 21:48:07,795 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 563 transitions. Word has length 263 [2020-10-23 21:48:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:07,796 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 563 transitions. [2020-10-23 21:48:07,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 21:48:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 563 transitions. [2020-10-23 21:48:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-23 21:48:07,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:07,800 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:07,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 21:48:07,800 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -755050188, now seen corresponding path program 10 times [2020-10-23 21:48:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:07,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253425853] [2020-10-23 21:48:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:10,708 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:10,710 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:11,865 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 21:48:11,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253425853] [2020-10-23 21:48:11,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:11,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 21:48:11,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904624212] [2020-10-23 21:48:11,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 21:48:11,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:11,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 21:48:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-23 21:48:11,868 INFO L87 Difference]: Start difference. First operand 533 states and 563 transitions. Second operand 32 states. [2020-10-23 21:48:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:17,878 INFO L93 Difference]: Finished difference Result 889 states and 938 transitions. [2020-10-23 21:48:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-23 21:48:17,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 269 [2020-10-23 21:48:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:17,883 INFO L225 Difference]: With dead ends: 889 [2020-10-23 21:48:17,883 INFO L226 Difference]: Without dead ends: 321 [2020-10-23 21:48:17,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1404, Invalid=7908, Unknown=0, NotChecked=0, Total=9312 [2020-10-23 21:48:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-23 21:48:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-10-23 21:48:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-23 21:48:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-10-23 21:48:17,992 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 269 [2020-10-23 21:48:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:17,993 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-10-23 21:48:17,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 21:48:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-10-23 21:48:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-23 21:48:17,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:17,996 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:17,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 21:48:17,996 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2102832284, now seen corresponding path program 11 times [2020-10-23 21:48:17,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:17,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991301704] [2020-10-23 21:48:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:20,005 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:20,007 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:21,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:21,138 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 21:48:21,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991301704] [2020-10-23 21:48:21,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-10-23 21:48:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869419413] [2020-10-23 21:48:21,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 21:48:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:21,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 21:48:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-10-23 21:48:21,142 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 29 states. [2020-10-23 21:48:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:24,692 INFO L93 Difference]: Finished difference Result 813 states and 861 transitions. [2020-10-23 21:48:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-23 21:48:24,694 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 269 [2020-10-23 21:48:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:24,697 INFO L225 Difference]: With dead ends: 813 [2020-10-23 21:48:24,697 INFO L226 Difference]: Without dead ends: 670 [2020-10-23 21:48:24,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=801, Invalid=4029, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 21:48:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-23 21:48:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 404. [2020-10-23 21:48:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-23 21:48:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 424 transitions. [2020-10-23 21:48:24,828 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 424 transitions. Word has length 269 [2020-10-23 21:48:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:24,828 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 424 transitions. [2020-10-23 21:48:24,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 21:48:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 424 transitions. [2020-10-23 21:48:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-23 21:48:24,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:24,831 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:24,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 21:48:24,832 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1487808516, now seen corresponding path program 12 times [2020-10-23 21:48:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:24,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082607111] [2020-10-23 21:48:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:26,880 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:26,882 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:27,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:28,061 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 21:48:28,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082607111] [2020-10-23 21:48:28,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:28,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-10-23 21:48:28,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958894799] [2020-10-23 21:48:28,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 21:48:28,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 21:48:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-10-23 21:48:28,064 INFO L87 Difference]: Start difference. First operand 404 states and 424 transitions. Second operand 31 states. [2020-10-23 21:48:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:31,666 INFO L93 Difference]: Finished difference Result 687 states and 728 transitions. [2020-10-23 21:48:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-23 21:48:31,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 275 [2020-10-23 21:48:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:31,671 INFO L225 Difference]: With dead ends: 687 [2020-10-23 21:48:31,672 INFO L226 Difference]: Without dead ends: 546 [2020-10-23 21:48:31,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1198, Invalid=4964, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 21:48:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-23 21:48:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2020-10-23 21:48:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-23 21:48:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 430 transitions. [2020-10-23 21:48:31,819 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 430 transitions. Word has length 275 [2020-10-23 21:48:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:31,819 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 430 transitions. [2020-10-23 21:48:31,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 21:48:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 430 transitions. [2020-10-23 21:48:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-23 21:48:31,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:31,833 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:31,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 21:48:31,833 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 336152420, now seen corresponding path program 13 times [2020-10-23 21:48:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:31,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723728582] [2020-10-23 21:48:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:34,915 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:34,917 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:36,267 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 21:48:36,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723728582] [2020-10-23 21:48:36,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:36,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-10-23 21:48:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366586500] [2020-10-23 21:48:36,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 21:48:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 21:48:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 21:48:36,269 INFO L87 Difference]: Start difference. First operand 410 states and 430 transitions. Second operand 33 states. [2020-10-23 21:48:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:42,932 INFO L93 Difference]: Finished difference Result 955 states and 1011 transitions. [2020-10-23 21:48:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-23 21:48:42,935 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 281 [2020-10-23 21:48:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:42,938 INFO L225 Difference]: With dead ends: 955 [2020-10-23 21:48:42,939 INFO L226 Difference]: Without dead ends: 812 [2020-10-23 21:48:42,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1470, Invalid=8630, Unknown=0, NotChecked=0, Total=10100 [2020-10-23 21:48:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-10-23 21:48:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2020-10-23 21:48:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-23 21:48:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 481 transitions. [2020-10-23 21:48:43,086 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 481 transitions. Word has length 281 [2020-10-23 21:48:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:43,086 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 481 transitions. [2020-10-23 21:48:43,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 21:48:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 481 transitions. [2020-10-23 21:48:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-23 21:48:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:43,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:43,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 21:48:43,090 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2052836660, now seen corresponding path program 14 times [2020-10-23 21:48:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:43,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283159612] [2020-10-23 21:48:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:45,345 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:45,347 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:46,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:46,893 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 21:48:46,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283159612] [2020-10-23 21:48:46,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:46,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-10-23 21:48:46,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100731989] [2020-10-23 21:48:46,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 21:48:46,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 21:48:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:48:46,895 INFO L87 Difference]: Start difference. First operand 458 states and 481 transitions. Second operand 35 states. [2020-10-23 21:48:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:48:51,515 INFO L93 Difference]: Finished difference Result 620 states and 653 transitions. [2020-10-23 21:48:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 21:48:51,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 281 [2020-10-23 21:48:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:48:51,522 INFO L225 Difference]: With dead ends: 620 [2020-10-23 21:48:51,522 INFO L226 Difference]: Without dead ends: 612 [2020-10-23 21:48:51,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1174, Invalid=5306, Unknown=0, NotChecked=0, Total=6480 [2020-10-23 21:48:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-23 21:48:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 583. [2020-10-23 21:48:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-23 21:48:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 616 transitions. [2020-10-23 21:48:51,744 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 616 transitions. Word has length 281 [2020-10-23 21:48:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:48:51,745 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 616 transitions. [2020-10-23 21:48:51,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 21:48:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 616 transitions. [2020-10-23 21:48:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-23 21:48:51,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:48:51,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:48:51,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 21:48:51,748 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:48:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:48:51,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1476523564, now seen corresponding path program 15 times [2020-10-23 21:48:51,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:48:51,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71238238] [2020-10-23 21:48:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:48:54,979 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:48:54,981 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:48:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:48:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:48:56,438 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 21:48:56,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71238238] [2020-10-23 21:48:56,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:48:56,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 21:48:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117319307] [2020-10-23 21:48:56,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 21:48:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:48:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 21:48:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 21:48:56,441 INFO L87 Difference]: Start difference. First operand 583 states and 616 transitions. Second operand 36 states. [2020-10-23 21:49:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:04,640 INFO L93 Difference]: Finished difference Result 1129 states and 1195 transitions. [2020-10-23 21:49:04,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-23 21:49:04,641 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 293 [2020-10-23 21:49:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:04,644 INFO L225 Difference]: With dead ends: 1129 [2020-10-23 21:49:04,644 INFO L226 Difference]: Without dead ends: 345 [2020-10-23 21:49:04,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1930, Invalid=11180, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 21:49:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-23 21:49:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-10-23 21:49:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-23 21:49:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 357 transitions. [2020-10-23 21:49:04,724 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 357 transitions. Word has length 293 [2020-10-23 21:49:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:04,724 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 357 transitions. [2020-10-23 21:49:04,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 21:49:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 357 transitions. [2020-10-23 21:49:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-23 21:49:04,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:04,726 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:04,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 21:49:04,726 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1127254636, now seen corresponding path program 16 times [2020-10-23 21:49:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:04,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670439795] [2020-10-23 21:49:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:06,990 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:06,992 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:08,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:08,476 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 21:49:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670439795] [2020-10-23 21:49:08,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:08,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-10-23 21:49:08,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385005637] [2020-10-23 21:49:08,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 21:49:08,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:08,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 21:49:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 21:49:08,479 INFO L87 Difference]: Start difference. First operand 342 states and 357 transitions. Second operand 33 states. [2020-10-23 21:49:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:13,655 INFO L93 Difference]: Finished difference Result 947 states and 1004 transitions. [2020-10-23 21:49:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-23 21:49:13,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 293 [2020-10-23 21:49:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:13,661 INFO L225 Difference]: With dead ends: 947 [2020-10-23 21:49:13,661 INFO L226 Difference]: Without dead ends: 783 [2020-10-23 21:49:13,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 21:49:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-23 21:49:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 450. [2020-10-23 21:49:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-23 21:49:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 472 transitions. [2020-10-23 21:49:13,793 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 472 transitions. Word has length 293 [2020-10-23 21:49:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:13,793 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 472 transitions. [2020-10-23 21:49:13,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 21:49:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 472 transitions. [2020-10-23 21:49:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-23 21:49:13,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:13,797 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:13,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 21:49:13,797 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1413138180, now seen corresponding path program 17 times [2020-10-23 21:49:13,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:13,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855453203] [2020-10-23 21:49:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:16,080 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:16,082 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:17,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:17,581 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 21:49:17,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855453203] [2020-10-23 21:49:17,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:17,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-10-23 21:49:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341787449] [2020-10-23 21:49:17,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 21:49:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 21:49:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 21:49:17,584 INFO L87 Difference]: Start difference. First operand 450 states and 472 transitions. Second operand 35 states. [2020-10-23 21:49:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:22,428 INFO L93 Difference]: Finished difference Result 761 states and 807 transitions. [2020-10-23 21:49:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 21:49:22,431 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 299 [2020-10-23 21:49:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:22,437 INFO L225 Difference]: With dead ends: 761 [2020-10-23 21:49:22,437 INFO L226 Difference]: Without dead ends: 608 [2020-10-23 21:49:22,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1588, Invalid=6602, Unknown=0, NotChecked=0, Total=8190 [2020-10-23 21:49:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-23 21:49:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 456. [2020-10-23 21:49:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-23 21:49:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 478 transitions. [2020-10-23 21:49:22,560 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 478 transitions. Word has length 299 [2020-10-23 21:49:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:22,561 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 478 transitions. [2020-10-23 21:49:22,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 21:49:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 478 transitions. [2020-10-23 21:49:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-23 21:49:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:22,562 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:22,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 21:49:22,563 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -122921892, now seen corresponding path program 18 times [2020-10-23 21:49:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:22,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783568777] [2020-10-23 21:49:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:26,109 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:26,111 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:27,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:28,176 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 21:49:28,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783568777] [2020-10-23 21:49:28,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:28,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-10-23 21:49:28,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416630757] [2020-10-23 21:49:28,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 21:49:28,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 21:49:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 21:49:28,180 INFO L87 Difference]: Start difference. First operand 456 states and 478 transitions. Second operand 37 states. [2020-10-23 21:49:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:37,613 INFO L93 Difference]: Finished difference Result 1128 states and 1196 transitions. [2020-10-23 21:49:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-23 21:49:37,616 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 305 [2020-10-23 21:49:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:37,621 INFO L225 Difference]: With dead ends: 1128 [2020-10-23 21:49:37,621 INFO L226 Difference]: Without dead ends: 964 [2020-10-23 21:49:37,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1949, Invalid=11623, Unknown=0, NotChecked=0, Total=13572 [2020-10-23 21:49:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-10-23 21:49:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 508. [2020-10-23 21:49:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-23 21:49:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 534 transitions. [2020-10-23 21:49:37,812 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 534 transitions. Word has length 305 [2020-10-23 21:49:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:37,812 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 534 transitions. [2020-10-23 21:49:37,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 21:49:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 534 transitions. [2020-10-23 21:49:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-23 21:49:37,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:37,815 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:37,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-23 21:49:37,816 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash 756216772, now seen corresponding path program 19 times [2020-10-23 21:49:37,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:37,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521698305] [2020-10-23 21:49:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:40,339 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:40,341 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:42,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:42,378 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 21:49:42,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521698305] [2020-10-23 21:49:42,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:42,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-10-23 21:49:42,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301082811] [2020-10-23 21:49:42,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 21:49:42,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 21:49:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:49:42,381 INFO L87 Difference]: Start difference. First operand 508 states and 534 transitions. Second operand 39 states. [2020-10-23 21:49:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:49:48,725 INFO L93 Difference]: Finished difference Result 698 states and 736 transitions. [2020-10-23 21:49:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-23 21:49:48,728 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 305 [2020-10-23 21:49:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:49:48,732 INFO L225 Difference]: With dead ends: 698 [2020-10-23 21:49:48,732 INFO L226 Difference]: Without dead ends: 690 [2020-10-23 21:49:48,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2020-10-23 21:49:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-10-23 21:49:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 657. [2020-10-23 21:49:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-23 21:49:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 695 transitions. [2020-10-23 21:49:49,001 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 695 transitions. Word has length 305 [2020-10-23 21:49:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:49:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 695 transitions. [2020-10-23 21:49:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 21:49:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 695 transitions. [2020-10-23 21:49:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-23 21:49:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:49:49,005 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:49:49,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-23 21:49:49,005 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:49:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:49:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1488803620, now seen corresponding path program 20 times [2020-10-23 21:49:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:49:49,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819463822] [2020-10-23 21:49:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:49:52,880 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:49:52,882 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:49:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:49:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:49:55,073 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 21:49:55,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819463822] [2020-10-23 21:49:55,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:49:55,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 21:49:55,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033025616] [2020-10-23 21:49:55,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 21:49:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:49:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 21:49:55,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 21:49:55,076 INFO L87 Difference]: Start difference. First operand 657 states and 695 transitions. Second operand 40 states. [2020-10-23 21:50:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:07,316 INFO L93 Difference]: Finished difference Result 1361 states and 1444 transitions. [2020-10-23 21:50:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 21:50:07,319 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-10-23 21:50:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:07,321 INFO L225 Difference]: With dead ends: 1361 [2020-10-23 21:50:07,322 INFO L226 Difference]: Without dead ends: 369 [2020-10-23 21:50:07,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5197 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2537, Invalid=15019, Unknown=0, NotChecked=0, Total=17556 [2020-10-23 21:50:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-23 21:50:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2020-10-23 21:50:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-23 21:50:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 382 transitions. [2020-10-23 21:50:07,482 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 382 transitions. Word has length 317 [2020-10-23 21:50:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:07,483 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 382 transitions. [2020-10-23 21:50:07,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 21:50:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 382 transitions. [2020-10-23 21:50:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-23 21:50:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:07,485 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:07,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-23 21:50:07,486 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash 51151500, now seen corresponding path program 21 times [2020-10-23 21:50:07,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:07,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187381086] [2020-10-23 21:50:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:10,150 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:10,152 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:11,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:11,941 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 21:50:11,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187381086] [2020-10-23 21:50:11,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:11,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-10-23 21:50:11,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140196047] [2020-10-23 21:50:11,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 21:50:11,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 21:50:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 21:50:11,943 INFO L87 Difference]: Start difference. First operand 366 states and 382 transitions. Second operand 37 states. [2020-10-23 21:50:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:19,348 INFO L93 Difference]: Finished difference Result 1093 states and 1160 transitions. [2020-10-23 21:50:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-23 21:50:19,350 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 317 [2020-10-23 21:50:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:19,355 INFO L225 Difference]: With dead ends: 1093 [2020-10-23 21:50:19,355 INFO L226 Difference]: Without dead ends: 908 [2020-10-23 21:50:19,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1412, Invalid=7330, Unknown=0, NotChecked=0, Total=8742 [2020-10-23 21:50:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-10-23 21:50:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 500. [2020-10-23 21:50:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-23 21:50:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 525 transitions. [2020-10-23 21:50:19,558 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 525 transitions. Word has length 317 [2020-10-23 21:50:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:19,558 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 525 transitions. [2020-10-23 21:50:19,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 21:50:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 525 transitions. [2020-10-23 21:50:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 21:50:19,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:19,562 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:19,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-23 21:50:19,562 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash 558403060, now seen corresponding path program 22 times [2020-10-23 21:50:19,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:19,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943330211] [2020-10-23 21:50:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:22,267 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:22,269 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:24,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:24,347 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 21:50:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943330211] [2020-10-23 21:50:24,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:24,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-10-23 21:50:24,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319665187] [2020-10-23 21:50:24,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 21:50:24,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 21:50:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 21:50:24,350 INFO L87 Difference]: Start difference. First operand 500 states and 525 transitions. Second operand 39 states. [2020-10-23 21:50:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:30,949 INFO L93 Difference]: Finished difference Result 835 states and 886 transitions. [2020-10-23 21:50:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-23 21:50:30,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 323 [2020-10-23 21:50:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:30,956 INFO L225 Difference]: With dead ends: 835 [2020-10-23 21:50:30,956 INFO L226 Difference]: Without dead ends: 670 [2020-10-23 21:50:30,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2033, Invalid=8473, Unknown=0, NotChecked=0, Total=10506 [2020-10-23 21:50:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-23 21:50:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 506. [2020-10-23 21:50:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-23 21:50:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 531 transitions. [2020-10-23 21:50:31,147 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 531 transitions. Word has length 323 [2020-10-23 21:50:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:31,148 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 531 transitions. [2020-10-23 21:50:31,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 21:50:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 531 transitions. [2020-10-23 21:50:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 21:50:31,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:31,150 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:31,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-23 21:50:31,150 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 802010452, now seen corresponding path program 23 times [2020-10-23 21:50:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:31,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259590990] [2020-10-23 21:50:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:32,200 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:50:32,685 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:50:33,129 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:50:33,711 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:50:35,451 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:35,452 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:37,728 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 21:50:37,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259590990] [2020-10-23 21:50:37,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:37,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-10-23 21:50:37,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757934053] [2020-10-23 21:50:37,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-23 21:50:37,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-23 21:50:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 21:50:37,731 INFO L87 Difference]: Start difference. First operand 506 states and 531 transitions. Second operand 41 states. [2020-10-23 21:50:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:50:50,785 INFO L93 Difference]: Finished difference Result 1313 states and 1394 transitions. [2020-10-23 21:50:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 21:50:50,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 329 [2020-10-23 21:50:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:50:50,795 INFO L225 Difference]: With dead ends: 1313 [2020-10-23 21:50:50,795 INFO L226 Difference]: Without dead ends: 1128 [2020-10-23 21:50:50,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5169 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2496, Invalid=15060, Unknown=0, NotChecked=0, Total=17556 [2020-10-23 21:50:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-23 21:50:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 566. [2020-10-23 21:50:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-23 21:50:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 595 transitions. [2020-10-23 21:50:51,105 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 595 transitions. Word has length 329 [2020-10-23 21:50:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:50:51,105 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 595 transitions. [2020-10-23 21:50:51,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-23 21:50:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 595 transitions. [2020-10-23 21:50:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 21:50:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:50:51,108 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:50:51,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-23 21:50:51,108 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:50:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:50:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash 109836476, now seen corresponding path program 24 times [2020-10-23 21:50:51,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:50:51,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956797719] [2020-10-23 21:50:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:50:53,959 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:50:53,960 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:50:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:56,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:50:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:50:56,430 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 21:50:56,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956797719] [2020-10-23 21:50:56,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:50:56,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-10-23 21:50:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440388166] [2020-10-23 21:50:56,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-23 21:50:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:50:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-23 21:50:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:50:56,432 INFO L87 Difference]: Start difference. First operand 566 states and 595 transitions. Second operand 43 states. [2020-10-23 21:51:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:04,930 INFO L93 Difference]: Finished difference Result 776 states and 819 transitions. [2020-10-23 21:51:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-23 21:51:04,933 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 329 [2020-10-23 21:51:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:04,938 INFO L225 Difference]: With dead ends: 776 [2020-10-23 21:51:04,939 INFO L226 Difference]: Without dead ends: 768 [2020-10-23 21:51:04,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2020-10-23 21:51:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-23 21:51:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 731. [2020-10-23 21:51:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-23 21:51:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 774 transitions. [2020-10-23 21:51:05,324 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 774 transitions. Word has length 329 [2020-10-23 21:51:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:05,324 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 774 transitions. [2020-10-23 21:51:05,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-23 21:51:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 774 transitions. [2020-10-23 21:51:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-23 21:51:05,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:05,328 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:05,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-23 21:51:05,328 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 816905244, now seen corresponding path program 25 times [2020-10-23 21:51:05,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:05,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736435237] [2020-10-23 21:51:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:06,341 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:06,729 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:07,094 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:08,098 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:08,709 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:09,093 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:09,265 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:51:09,552 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:09,554 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:11,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:12,094 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 21:51:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736435237] [2020-10-23 21:51:12,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:12,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 21:51:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896753563] [2020-10-23 21:51:12,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 21:51:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 21:51:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 21:51:12,097 INFO L87 Difference]: Start difference. First operand 731 states and 774 transitions. Second operand 44 states. [2020-10-23 21:51:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:29,017 INFO L93 Difference]: Finished difference Result 1605 states and 1706 transitions. [2020-10-23 21:51:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-23 21:51:29,020 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 341 [2020-10-23 21:51:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:29,023 INFO L225 Difference]: With dead ends: 1605 [2020-10-23 21:51:29,023 INFO L226 Difference]: Without dead ends: 393 [2020-10-23 21:51:29,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6830 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3225, Invalid=19425, Unknown=0, NotChecked=0, Total=22650 [2020-10-23 21:51:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-23 21:51:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2020-10-23 21:51:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-23 21:51:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 407 transitions. [2020-10-23 21:51:29,169 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 407 transitions. Word has length 341 [2020-10-23 21:51:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:29,169 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 407 transitions. [2020-10-23 21:51:29,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 21:51:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 407 transitions. [2020-10-23 21:51:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-23 21:51:29,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:29,172 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:29,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-23 21:51:29,172 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1978805372, now seen corresponding path program 26 times [2020-10-23 21:51:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:29,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135795687] [2020-10-23 21:51:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:32,198 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:32,200 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:34,569 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 21:51:34,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135795687] [2020-10-23 21:51:34,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:34,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-10-23 21:51:34,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377629194] [2020-10-23 21:51:34,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-23 21:51:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-23 21:51:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 21:51:34,571 INFO L87 Difference]: Start difference. First operand 390 states and 407 transitions. Second operand 41 states. [2020-10-23 21:51:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:51:45,130 INFO L93 Difference]: Finished difference Result 1251 states and 1329 transitions. [2020-10-23 21:51:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-23 21:51:45,134 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 341 [2020-10-23 21:51:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:51:45,139 INFO L225 Difference]: With dead ends: 1251 [2020-10-23 21:51:45,140 INFO L226 Difference]: Without dead ends: 1045 [2020-10-23 21:51:45,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1782, Invalid=9348, Unknown=0, NotChecked=0, Total=11130 [2020-10-23 21:51:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-10-23 21:51:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 550. [2020-10-23 21:51:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-23 21:51:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 578 transitions. [2020-10-23 21:51:45,399 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 578 transitions. Word has length 341 [2020-10-23 21:51:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:51:45,400 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 578 transitions. [2020-10-23 21:51:45,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-23 21:51:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 578 transitions. [2020-10-23 21:51:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-23 21:51:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:51:45,403 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:51:45,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-23 21:51:45,403 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:51:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:51:45,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2067277548, now seen corresponding path program 27 times [2020-10-23 21:51:45,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:51:45,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71109938] [2020-10-23 21:51:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:51:48,553 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:51:48,556 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:51:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:51,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:51:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:51:51,232 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 21:51:51,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71109938] [2020-10-23 21:51:51,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:51:51,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-10-23 21:51:51,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420621107] [2020-10-23 21:51:51,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-23 21:51:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:51:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-23 21:51:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 21:51:51,235 INFO L87 Difference]: Start difference. First operand 550 states and 578 transitions. Second operand 43 states. [2020-10-23 21:52:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:00,144 INFO L93 Difference]: Finished difference Result 909 states and 965 transitions. [2020-10-23 21:52:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-23 21:52:00,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 347 [2020-10-23 21:52:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:00,151 INFO L225 Difference]: With dead ends: 909 [2020-10-23 21:52:00,151 INFO L226 Difference]: Without dead ends: 732 [2020-10-23 21:52:00,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2533, Invalid=10577, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 21:52:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-10-23 21:52:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 556. [2020-10-23 21:52:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-23 21:52:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 584 transitions. [2020-10-23 21:52:00,400 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 584 transitions. Word has length 347 [2020-10-23 21:52:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:00,400 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 584 transitions. [2020-10-23 21:52:00,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-23 21:52:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 584 transitions. [2020-10-23 21:52:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-23 21:52:00,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:00,403 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:00,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-23 21:52:00,404 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash -210939316, now seen corresponding path program 28 times [2020-10-23 21:52:00,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:00,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638441496] [2020-10-23 21:52:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:01,508 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:01,948 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:02,348 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:03,019 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:03,459 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:04,132 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:04,542 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:04,732 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:05,055 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:05,057 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:08,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:08,262 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 21:52:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638441496] [2020-10-23 21:52:08,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:08,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-10-23 21:52:08,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229164793] [2020-10-23 21:52:08,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 21:52:08,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:08,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 21:52:08,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 21:52:08,265 INFO L87 Difference]: Start difference. First operand 556 states and 584 transitions. Second operand 45 states. [2020-10-23 21:52:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:26,601 INFO L93 Difference]: Finished difference Result 1510 states and 1605 transitions. [2020-10-23 21:52:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-10-23 21:52:26,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 353 [2020-10-23 21:52:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:26,613 INFO L225 Difference]: With dead ends: 1510 [2020-10-23 21:52:26,613 INFO L226 Difference]: Without dead ends: 1304 [2020-10-23 21:52:26,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6586 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=3111, Invalid=18941, Unknown=0, NotChecked=0, Total=22052 [2020-10-23 21:52:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-10-23 21:52:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 628. [2020-10-23 21:52:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-10-23 21:52:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 661 transitions. [2020-10-23 21:52:26,998 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 661 transitions. Word has length 353 [2020-10-23 21:52:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:26,999 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 661 transitions. [2020-10-23 21:52:26,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 21:52:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 661 transitions. [2020-10-23 21:52:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-23 21:52:27,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:27,002 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:27,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-23 21:52:27,002 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash 177160628, now seen corresponding path program 29 times [2020-10-23 21:52:27,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:27,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375333963] [2020-10-23 21:52:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:30,465 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:30,467 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:33,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:33,731 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 21:52:33,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375333963] [2020-10-23 21:52:33,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:33,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-10-23 21:52:33,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222178273] [2020-10-23 21:52:33,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-23 21:52:33,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:33,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-23 21:52:33,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:52:33,734 INFO L87 Difference]: Start difference. First operand 628 states and 661 transitions. Second operand 47 states. [2020-10-23 21:52:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:52:43,935 INFO L93 Difference]: Finished difference Result 854 states and 902 transitions. [2020-10-23 21:52:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 21:52:43,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 353 [2020-10-23 21:52:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:52:43,943 INFO L225 Difference]: With dead ends: 854 [2020-10-23 21:52:43,944 INFO L226 Difference]: Without dead ends: 846 [2020-10-23 21:52:43,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2263, Invalid=9947, Unknown=0, NotChecked=0, Total=12210 [2020-10-23 21:52:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-23 21:52:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 805. [2020-10-23 21:52:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2020-10-23 21:52:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 853 transitions. [2020-10-23 21:52:44,538 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 853 transitions. Word has length 353 [2020-10-23 21:52:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:52:44,539 INFO L481 AbstractCegarLoop]: Abstraction has 805 states and 853 transitions. [2020-10-23 21:52:44,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-23 21:52:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 853 transitions. [2020-10-23 21:52:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-23 21:52:44,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:52:44,543 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:52:44,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-23 21:52:44,544 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:52:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:52:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash 433906964, now seen corresponding path program 30 times [2020-10-23 21:52:44,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:52:44,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923291054] [2020-10-23 21:52:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:52:45,739 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:46,197 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:46,639 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:47,348 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:47,849 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:48,593 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:49,029 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:49,227 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:52:49,580 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:52:49,582 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:52:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:52,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:52:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:52:52,925 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 21:52:52,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923291054] [2020-10-23 21:52:52,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:52:52,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 21:52:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481742636] [2020-10-23 21:52:52,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 21:52:52,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:52:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 21:52:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 21:52:52,940 INFO L87 Difference]: Start difference. First operand 805 states and 853 transitions. Second operand 48 states. [2020-10-23 21:53:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:15,955 INFO L93 Difference]: Finished difference Result 1861 states and 1981 transitions. [2020-10-23 21:53:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-23 21:53:15,959 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 365 [2020-10-23 21:53:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:15,962 INFO L225 Difference]: With dead ends: 1861 [2020-10-23 21:53:15,962 INFO L226 Difference]: Without dead ends: 417 [2020-10-23 21:53:15,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8687 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=3994, Invalid=24398, Unknown=0, NotChecked=0, Total=28392 [2020-10-23 21:53:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-23 21:53:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2020-10-23 21:53:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-23 21:53:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 432 transitions. [2020-10-23 21:53:16,177 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 432 transitions. Word has length 365 [2020-10-23 21:53:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:16,177 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 432 transitions. [2020-10-23 21:53:16,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 21:53:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 432 transitions. [2020-10-23 21:53:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-23 21:53:16,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:16,180 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:16,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-23 21:53:16,180 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1974245252, now seen corresponding path program 31 times [2020-10-23 21:53:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:16,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405887544] [2020-10-23 21:53:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:19,799 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:19,801 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:22,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:23,015 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 21:53:23,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405887544] [2020-10-23 21:53:23,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:23,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-10-23 21:53:23,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445255725] [2020-10-23 21:53:23,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 21:53:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 21:53:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 21:53:23,020 INFO L87 Difference]: Start difference. First operand 414 states and 432 transitions. Second operand 45 states. [2020-10-23 21:53:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:36,973 INFO L93 Difference]: Finished difference Result 1421 states and 1511 transitions. [2020-10-23 21:53:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-23 21:53:36,984 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 365 [2020-10-23 21:53:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:36,991 INFO L225 Difference]: With dead ends: 1421 [2020-10-23 21:53:36,991 INFO L226 Difference]: Without dead ends: 1194 [2020-10-23 21:53:36,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3561 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2195, Invalid=11611, Unknown=0, NotChecked=0, Total=13806 [2020-10-23 21:53:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-10-23 21:53:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 600. [2020-10-23 21:53:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-23 21:53:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 631 transitions. [2020-10-23 21:53:37,335 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 631 transitions. Word has length 365 [2020-10-23 21:53:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:37,336 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 631 transitions. [2020-10-23 21:53:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 21:53:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 631 transitions. [2020-10-23 21:53:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-23 21:53:37,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:37,340 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:37,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-23 21:53:37,340 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2048132068, now seen corresponding path program 32 times [2020-10-23 21:53:37,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:37,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720091447] [2020-10-23 21:53:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:41,100 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:53:41,102 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:53:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:53:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:53:44,701 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 21:53:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720091447] [2020-10-23 21:53:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:53:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-10-23 21:53:44,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352030822] [2020-10-23 21:53:44,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-23 21:53:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:53:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-23 21:53:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 21:53:44,704 INFO L87 Difference]: Start difference. First operand 600 states and 631 transitions. Second operand 47 states. [2020-10-23 21:53:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:53:56,939 INFO L93 Difference]: Finished difference Result 983 states and 1044 transitions. [2020-10-23 21:53:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-23 21:53:56,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 371 [2020-10-23 21:53:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:53:56,948 INFO L225 Difference]: With dead ends: 983 [2020-10-23 21:53:56,949 INFO L226 Difference]: Without dead ends: 794 [2020-10-23 21:53:56,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3088, Invalid=12914, Unknown=0, NotChecked=0, Total=16002 [2020-10-23 21:53:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-10-23 21:53:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 606. [2020-10-23 21:53:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-23 21:53:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 637 transitions. [2020-10-23 21:53:57,270 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 637 transitions. Word has length 371 [2020-10-23 21:53:57,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:53:57,270 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 637 transitions. [2020-10-23 21:53:57,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-23 21:53:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 637 transitions. [2020-10-23 21:53:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-23 21:53:57,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:53:57,275 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:53:57,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-23 21:53:57,275 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:53:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:53:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1140116668, now seen corresponding path program 33 times [2020-10-23 21:53:57,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:53:57,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695470322] [2020-10-23 21:53:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:53:58,586 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:53:59,088 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:53:59,547 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:00,323 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:00,862 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:01,683 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:02,157 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:02,390 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:02,793 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:02,795 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:06,696 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 21:54:06,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695470322] [2020-10-23 21:54:06,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:06,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-10-23 21:54:06,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373612097] [2020-10-23 21:54:06,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-23 21:54:06,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:06,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-23 21:54:06,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 21:54:06,699 INFO L87 Difference]: Start difference. First operand 606 states and 637 transitions. Second operand 49 states. [2020-10-23 21:54:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:31,523 INFO L93 Difference]: Finished difference Result 1719 states and 1829 transitions. [2020-10-23 21:54:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-23 21:54:31,528 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 377 [2020-10-23 21:54:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:31,538 INFO L225 Difference]: With dead ends: 1719 [2020-10-23 21:54:31,538 INFO L226 Difference]: Without dead ends: 1492 [2020-10-23 21:54:31,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8175 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3794, Invalid=23266, Unknown=0, NotChecked=0, Total=27060 [2020-10-23 21:54:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-10-23 21:54:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 690. [2020-10-23 21:54:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-23 21:54:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 727 transitions. [2020-10-23 21:54:32,056 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 727 transitions. Word has length 377 [2020-10-23 21:54:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:32,057 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 727 transitions. [2020-10-23 21:54:32,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-23 21:54:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 727 transitions. [2020-10-23 21:54:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-23 21:54:32,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:32,060 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:32,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-23 21:54:32,060 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1877160276, now seen corresponding path program 34 times [2020-10-23 21:54:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942903448] [2020-10-23 21:54:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:35,935 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:54:35,937 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:54:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:40,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:54:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:54:40,311 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 21:54:40,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942903448] [2020-10-23 21:54:40,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:54:40,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-10-23 21:54:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641823479] [2020-10-23 21:54:40,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-23 21:54:40,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:54:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-23 21:54:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:54:40,313 INFO L87 Difference]: Start difference. First operand 690 states and 727 transitions. Second operand 51 states. [2020-10-23 21:54:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:54:54,602 INFO L93 Difference]: Finished difference Result 932 states and 985 transitions. [2020-10-23 21:54:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-23 21:54:54,607 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 377 [2020-10-23 21:54:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:54:54,612 INFO L225 Difference]: With dead ends: 932 [2020-10-23 21:54:54,612 INFO L226 Difference]: Without dead ends: 924 [2020-10-23 21:54:54,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=2706, Invalid=11814, Unknown=0, NotChecked=0, Total=14520 [2020-10-23 21:54:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-10-23 21:54:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 879. [2020-10-23 21:54:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-10-23 21:54:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 932 transitions. [2020-10-23 21:54:55,329 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 932 transitions. Word has length 377 [2020-10-23 21:54:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:54:55,329 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 932 transitions. [2020-10-23 21:54:55,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-23 21:54:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 932 transitions. [2020-10-23 21:54:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-23 21:54:55,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:54:55,333 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:54:55,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-23 21:54:55,333 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:54:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:54:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -859762164, now seen corresponding path program 35 times [2020-10-23 21:54:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:54:55,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807904407] [2020-10-23 21:54:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:54:56,777 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:57,321 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:57,807 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:58,631 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:54:59,209 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:55:00,057 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:55:00,561 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:55:00,810 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:55:01,225 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:01,226 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:05,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:05,616 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 21:55:05,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807904407] [2020-10-23 21:55:05,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:05,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 21:55:05,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080607880] [2020-10-23 21:55:05,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 21:55:05,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 21:55:05,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 21:55:05,619 INFO L87 Difference]: Start difference. First operand 879 states and 932 transitions. Second operand 52 states. [2020-10-23 21:55:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:32,798 INFO L93 Difference]: Finished difference Result 2129 states and 2269 transitions. [2020-10-23 21:55:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-23 21:55:32,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 389 [2020-10-23 21:55:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:32,805 INFO L225 Difference]: With dead ends: 2129 [2020-10-23 21:55:32,806 INFO L226 Difference]: Without dead ends: 441 [2020-10-23 21:55:32,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=4844, Invalid=29938, Unknown=0, NotChecked=0, Total=34782 [2020-10-23 21:55:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-23 21:55:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2020-10-23 21:55:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-23 21:55:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 457 transitions. [2020-10-23 21:55:33,034 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 457 transitions. Word has length 389 [2020-10-23 21:55:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:33,034 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 457 transitions. [2020-10-23 21:55:33,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 21:55:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 457 transitions. [2020-10-23 21:55:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-23 21:55:33,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:33,037 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:55:33,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-23 21:55:33,038 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash -623033996, now seen corresponding path program 36 times [2020-10-23 21:55:33,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:33,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654681951] [2020-10-23 21:55:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:55:37,039 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:55:37,041 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:55:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:41,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:55:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:55:41,277 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 21:55:41,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654681951] [2020-10-23 21:55:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:55:41,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-10-23 21:55:41,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317401602] [2020-10-23 21:55:41,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-23 21:55:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:55:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-23 21:55:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 21:55:41,280 INFO L87 Difference]: Start difference. First operand 438 states and 457 transitions. Second operand 49 states. [2020-10-23 21:55:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:55:57,622 INFO L93 Difference]: Finished difference Result 1603 states and 1706 transitions. [2020-10-23 21:55:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-23 21:55:57,628 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 389 [2020-10-23 21:55:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:55:57,632 INFO L225 Difference]: With dead ends: 1603 [2020-10-23 21:55:57,632 INFO L226 Difference]: Without dead ends: 1355 [2020-10-23 21:55:57,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4375 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2651, Invalid=14119, Unknown=0, NotChecked=0, Total=16770 [2020-10-23 21:55:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-23 21:55:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 650. [2020-10-23 21:55:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-23 21:55:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 684 transitions. [2020-10-23 21:55:58,073 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 684 transitions. Word has length 389 [2020-10-23 21:55:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:55:58,073 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 684 transitions. [2020-10-23 21:55:58,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-23 21:55:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 684 transitions. [2020-10-23 21:55:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-23 21:55:58,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:55:58,076 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:55:58,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-23 21:55:58,076 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:55:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:55:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2094802140, now seen corresponding path program 37 times [2020-10-23 21:55:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:55:58,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659861319] [2020-10-23 21:55:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:02,413 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:02,415 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:06,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:06,973 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 21:56:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659861319] [2020-10-23 21:56:06,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:06,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-10-23 21:56:06,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811879726] [2020-10-23 21:56:06,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-23 21:56:06,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-23 21:56:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 21:56:06,976 INFO L87 Difference]: Start difference. First operand 650 states and 684 transitions. Second operand 51 states. [2020-10-23 21:56:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:56:21,066 INFO L93 Difference]: Finished difference Result 1057 states and 1123 transitions. [2020-10-23 21:56:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-23 21:56:21,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 395 [2020-10-23 21:56:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:56:21,076 INFO L225 Difference]: With dead ends: 1057 [2020-10-23 21:56:21,077 INFO L226 Difference]: Without dead ends: 856 [2020-10-23 21:56:21,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3698, Invalid=15484, Unknown=0, NotChecked=0, Total=19182 [2020-10-23 21:56:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-10-23 21:56:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 656. [2020-10-23 21:56:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-10-23 21:56:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 690 transitions. [2020-10-23 21:56:21,504 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 690 transitions. Word has length 395 [2020-10-23 21:56:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:56:21,505 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 690 transitions. [2020-10-23 21:56:21,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-23 21:56:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 690 transitions. [2020-10-23 21:56:21,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-23 21:56:21,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:56:21,509 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:56:21,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-23 21:56:21,509 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:56:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:56:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash -525903812, now seen corresponding path program 38 times [2020-10-23 21:56:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:56:21,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144493250] [2020-10-23 21:56:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:56:22,934 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:23,513 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:24,055 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:24,929 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:25,545 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:26,442 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:26,983 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:27,221 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:56:27,654 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:56:27,656 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:56:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:56:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:56:32,514 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 21:56:32,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144493250] [2020-10-23 21:56:32,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:56:32,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-10-23 21:56:32,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752312474] [2020-10-23 21:56:32,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-23 21:56:32,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:56:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-23 21:56:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 21:56:32,517 INFO L87 Difference]: Start difference. First operand 656 states and 690 transitions. Second operand 53 states. [2020-10-23 21:57:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:01,301 INFO L93 Difference]: Finished difference Result 1940 states and 2066 transitions. [2020-10-23 21:57:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-23 21:57:01,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 401 [2020-10-23 21:57:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:01,312 INFO L225 Difference]: With dead ends: 1940 [2020-10-23 21:57:01,313 INFO L226 Difference]: Without dead ends: 1692 [2020-10-23 21:57:01,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9936 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=4545, Invalid=28035, Unknown=0, NotChecked=0, Total=32580 [2020-10-23 21:57:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2020-10-23 21:57:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 752. [2020-10-23 21:57:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-23 21:57:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 793 transitions. [2020-10-23 21:57:01,990 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 793 transitions. Word has length 401 [2020-10-23 21:57:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:01,990 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 793 transitions. [2020-10-23 21:57:01,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-23 21:57:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 793 transitions. [2020-10-23 21:57:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-23 21:57:01,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:01,995 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:01,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-23 21:57:01,995 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:01,996 INFO L82 PathProgramCache]: Analyzing trace with hash -323706972, now seen corresponding path program 39 times [2020-10-23 21:57:01,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:01,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435420721] [2020-10-23 21:57:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:06,286 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:06,288 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:11,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:11,655 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 21:57:11,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435420721] [2020-10-23 21:57:11,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:11,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-10-23 21:57:11,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945776244] [2020-10-23 21:57:11,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-23 21:57:11,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-23 21:57:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 21:57:11,658 INFO L87 Difference]: Start difference. First operand 752 states and 793 transitions. Second operand 55 states. [2020-10-23 21:57:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:27,692 INFO L93 Difference]: Finished difference Result 1010 states and 1068 transitions. [2020-10-23 21:57:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-23 21:57:27,697 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 401 [2020-10-23 21:57:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:27,701 INFO L225 Difference]: With dead ends: 1010 [2020-10-23 21:57:27,702 INFO L226 Difference]: Without dead ends: 1002 [2020-10-23 21:57:27,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=3189, Invalid=13841, Unknown=0, NotChecked=0, Total=17030 [2020-10-23 21:57:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-10-23 21:57:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 953. [2020-10-23 21:57:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-10-23 21:57:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1011 transitions. [2020-10-23 21:57:28,614 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1011 transitions. Word has length 401 [2020-10-23 21:57:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:28,615 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1011 transitions. [2020-10-23 21:57:28,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-23 21:57:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1011 transitions. [2020-10-23 21:57:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-23 21:57:28,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:28,619 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:28,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-23 21:57:28,619 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 542999300, now seen corresponding path program 40 times [2020-10-23 21:57:28,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:28,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404058481] [2020-10-23 21:57:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:30,171 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:30,784 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:31,356 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:32,321 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:32,949 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:33,056 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-23 21:57:33,882 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:33,988 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-23 21:57:34,493 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:34,753 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-23 21:57:35,238 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:57:35,240 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:40,800 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 21:57:40,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404058481] [2020-10-23 21:57:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:40,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 21:57:40,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998748525] [2020-10-23 21:57:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 21:57:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 21:57:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 21:57:40,803 INFO L87 Difference]: Start difference. First operand 953 states and 1011 transitions. Second operand 56 states. [2020-10-23 21:58:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:18,348 INFO L93 Difference]: Finished difference Result 2409 states and 2570 transitions. [2020-10-23 21:58:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-23 21:58:18,354 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 413 [2020-10-23 21:58:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:18,356 INFO L225 Difference]: With dead ends: 2409 [2020-10-23 21:58:18,356 INFO L226 Difference]: Without dead ends: 465 [2020-10-23 21:58:18,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13073 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=5775, Invalid=36045, Unknown=0, NotChecked=0, Total=41820 [2020-10-23 21:58:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-23 21:58:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 462. [2020-10-23 21:58:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-23 21:58:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 482 transitions. [2020-10-23 21:58:18,663 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 482 transitions. Word has length 413 [2020-10-23 21:58:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:18,664 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 482 transitions. [2020-10-23 21:58:18,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 21:58:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 482 transitions. [2020-10-23 21:58:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-23 21:58:18,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:18,666 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:18,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-23 21:58:18,667 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1859428756, now seen corresponding path program 41 times [2020-10-23 21:58:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:18,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103326784] [2020-10-23 21:58:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:23,355 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:58:23,356 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:28,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:58:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:58:28,937 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 21:58:28,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103326784] [2020-10-23 21:58:28,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:58:28,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-10-23 21:58:28,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351379758] [2020-10-23 21:58:28,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-23 21:58:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:58:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-23 21:58:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 21:58:28,940 INFO L87 Difference]: Start difference. First operand 462 states and 482 transitions. Second operand 53 states. [2020-10-23 21:58:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:58:52,234 INFO L93 Difference]: Finished difference Result 1797 states and 1914 transitions. [2020-10-23 21:58:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-10-23 21:58:52,240 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 413 [2020-10-23 21:58:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:58:52,244 INFO L225 Difference]: With dead ends: 1797 [2020-10-23 21:58:52,245 INFO L226 Difference]: Without dead ends: 1528 [2020-10-23 21:58:52,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3150, Invalid=16872, Unknown=0, NotChecked=0, Total=20022 [2020-10-23 21:58:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-10-23 21:58:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 700. [2020-10-23 21:58:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-10-23 21:58:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 737 transitions. [2020-10-23 21:58:52,782 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 737 transitions. Word has length 413 [2020-10-23 21:58:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:58:52,782 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 737 transitions. [2020-10-23 21:58:52,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-23 21:58:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 737 transitions. [2020-10-23 21:58:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-23 21:58:52,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:58:52,785 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:58:52,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-23 21:58:52,786 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:58:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:58:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash 554731988, now seen corresponding path program 42 times [2020-10-23 21:58:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:58:52,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851971307] [2020-10-23 21:58:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:58:57,512 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:58:57,514 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:58:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat